UPPSC Prelims 2018 Question Paper with Answers & Explanations

Explanation

Sustainable development is defined as a strategy that promotes economic and social progress while ensuring that the utilization of resources and energy does not lead to environmental degradation or resource exhaustion for future generations. This concept gained global prominence through the 1987 Brundtland Commission report, Our Common Future, which introduced the principle of intergenerational equity. The objective is to maintain or improve the current standard of living and human comfort by utilizing technological innovations and efficient management practices that preserve the natural capital. It seeks a balance where the rate of resource consumption and waste generation remains within the carrying capacity of the Earth, thereby securing a viable ecosystem and resource base for the long term.

Explanation

World Population Day is an annual international observance held on 11 July to focus attention on the urgency and importance of population issues. It was established by the Governing Council of the United Nations Development Programme in 1989. The choice of date was inspired by 11 July 1987, known as Five Billion Day, which marked the approximate date when the global population reached five billion people. The United Nations General Assembly subsequently decided to continue observing the day through resolution 45/216 in December 1990 to enhance awareness of population-related themes such as family planning, poverty, gender equality, maternal health, and human rights.

Explanation

The Planning Commission served as the nodal agency in India for the estimation of poverty and the determination of the poverty line. It traditionally constituted expert groups to develop methodologies based on consumption expenditure data collected by the National Sample Survey Office (NSSO). Notable committees formed under its aegis include the Alagh Committee (1979), the Lakdawala Committee (1993), and the Tendulkar Committee (2009). Following the replacement of the Planning Commission by NITI Aayog in 2015, the responsibility for coordinating poverty-related estimates and policy frameworks transitioned to NITI Aayog, which employs task forces to refine the definition and measurement of poverty in the Indian context.

Explanation

Maharashtra consistently holds the top position in India regarding the total length of roads. According to the Basic Road Statistics of India reports published by the Ministry of Road Transport and Highways (MoRTH), Maharashtra possesses the most extensive road network in the country. This total length includes the cumulative distance of National Highways, State Highways, District Roads, and Rural Roads. The state's leadership in this metric is attributed to its large geographical area and significant investments in connecting its diverse industrial hubs and vast rural hinterlands through various infrastructure development programs. As of the data available in 2018, Maharashtra's road network was substantially longer than those of other high-ranking states.

Explanation

The Direct Tax Code (DTC) was designed to simplify and consolidate the laws relating to direct taxes in India, with the primary objective of replacing the outdated Income Tax Act, 1961. It aimed to create a more efficient tax system by streamlining tax rates, eliminating unnecessary exemptions, and broadening the tax base. Since direct taxes are those paid directly by an individual or organization to the imposing entity, such as taxes on personal income and corporate profits, the DTC is intrinsically linked to the regulation and collection of income tax. Under this framework, the code intended to improve tax compliance and reduce litigation by providing clearer definitions and more stable tax administration for all income-earning entities.

Explanation

Greenpeace International is the global coordinating body for the Greenpeace network, an independent campaigning organization that uses non-violent creative confrontation to expose global environmental problems. While the organization's roots trace back to a group of activists in Vancouver, Canada, in 1971, the international headquarters, officially known as Stichting Greenpeace Council, was established in Amsterdam, Netherlands, in 1979. This central office facilitates the coordination, strategy, and logistics for various national and regional offices operating across more than fifty countries worldwide.

Explanation

The ABC Index stands for the Achievements of Baby and Child Index and was highlighted in the Economic Survey 2017-18 to monitor the progress of child development in India. This index is a composite measure calculated as the arithmetic mean of four key indicators: survival, immunization, nutrition, and schooling. By aggregating these metrics, the index provides a simplified overview of child health and wellbeing across different states. The survival component is typically measured as 100 minus the infant mortality rate, while the nutrition component tracks the proportion of children who are not underweight. Because it focuses heavily on neonatal survival, preventive healthcare through vaccines, and nutritional outcomes, it is a significant tool for assessing the effectiveness of health policies and social infrastructure aimed at the early stages of life.

Explanation

The 2018 Revision of World Urbanization Prospects, released by the UN Department of Economic and Social Affairs (UN-DESA), confirmed that 55% of the world population was living in urban areas. This marked a significant milestone in global demographic trends, as the urban population had increased from just 30% in 1950. The report identified that the most urbanized regions were Northern America at 82% and Latin America and the Caribbean at 81%. This data serves as a critical benchmark for sustainable development goals, particularly for planning infrastructure and services in rapidly growing cities across Asia and Africa, which are expected to lead future urbanization trends.

Explanation

Secondary pollutants are not emitted directly from a source but are formed in the atmosphere when primary pollutants undergo chemical or physical reactions with other substances or sunlight. Smog, specifically photochemical smog, is a classic example of a secondary pollutant. It is formed through complex atmospheric reactions involving nitrogen oxides (NOₓ) and volatile organic compounds (VOCs) in the presence of solar ultraviolet radiation. These reactions produce ground-level ozone and other oxidants, resulting in the characteristic hazy mixture that reduces visibility and affects respiratory health. Since it requires specific environmental conditions and precursor chemicals to react within the air, it is classified as a secondary rather than a primary pollutant.

Explanation

Coral reefs are often referred to as the rainforests of the sea because they host an immense concentration of biodiversity within a very small geographical area. While they cover less than 0.1 percent of the ocean floor, they support approximately 25 percent of all marine species. In terms of taxonomic breadth, coral reefs often exhibit higher diversity than terrestrial ecosystems because they contain representatives of nearly every animal phylum. The complex three-dimensional structure of the calcium carbonate skeletons produced by corals creates a vast array of ecological niches, providing food, shelter, and breeding grounds for a diverse range of fish, invertebrates, and microorganisms. This structural complexity allows for an exceptionally high degree of species richness and density relative to the area occupied.

Explanation

Pearls are produced by bivalve mollusks, such as pearl oysters and freshwater mussels, which belong to the phylum Mollusca. They are formed as a defense mechanism when an irritant becomes trapped within the soft tissue of the mollusk, prompting the animal to secrete layers of nacre (a composite of calcium carbonate and conchiolin) to encase the intruder. Because mollusks are biologically distinct from the class Insecta, which belongs to the phylum Arthropoda, pearls are not derived from insects.

Explanation

The decibel (dB) scale is a logarithmic unit used to measure the intensity of sound relative to the threshold of human hearing, which is defined as 0 dB. In standard acoustic charts and environmental science textbooks, the rustling of tree leaves under normal circumstances is classified as a very faint sound and is typically assigned a value of 20 dB. This intensity level is slightly higher than the threshold of hearing but lower than a soft whisper, which generally measures around 30 dB. The sound intensity L in decibels is determined by the formula L = 10 log₁₀(I/I₀), where I is the intensity of the sound and I₀ is the reference intensity (10⁻¹² W/m²). A measurement of 20 dB indicates that the sound of rustling leaves is 100 times more intense than the quietest sound a human ear can detect.

Explanation

The 21st Conference of the Parties (COP21) to the United Nations Framework Convention on Climate Change (UNFCCC) was held in Paris, France, from November 30 to December 12, 2015. This summit was a historic milestone in international climate diplomacy as it resulted in the adoption of the Paris Agreement. The agreement established a global framework to combat climate change by aiming to keep the increase in the global average temperature to well below 2 degrees Celsius above pre-industrial levels, while pursuing efforts to limit the temperature increase to 1.5 degrees Celsius. It introduced the mechanism of Nationally Determined Contributions (NDCs), where each country voluntarily commits to specific greenhouse gas emission reduction targets and adaptation strategies.

Explanation

The National Action Plan on Climate Change (NAPCC) was formally launched by the Government of India on June 30, 2008. It was designed to outline a national strategy to address the challenges posed by climate change while maintaining the country's development objectives. The plan focuses on eight core national missions, which include the National Solar Mission, the National Mission for Enhanced Energy Efficiency, and the National Water Mission, among others. These missions aim to promote sustainable development through the use of clean technologies and public-private partnerships, establishing a long-term framework for India's climate mitigation and adaptation efforts.

Explanation

Marine ecosystems are considered the most stable because of their immense size and the inherent physical and chemical properties of the ocean environment. Covering about 71 percent of the Earth's surface, the vast volume of water acts as a significant thermal buffer due to its high specific heat capacity, which minimizes temperature fluctuations. Additionally, the chemical composition of seawater, including its salinity and dissolved gas concentrations, remains remarkably constant over long periods. This high degree of environmental consistency and the interconnected nature of the global ocean provide a stable habitat that is less susceptible to the rapid atmospheric and climatic changes that frequently impact terrestrial environments.

Explanation

Incineration is a waste treatment process involving the combustion of organic substances contained in waste materials. Incinerators are thermal treatment systems that convert waste into ash, flue gas, and heat at high temperatures. This method is used to reduce the volume of solid waste by approximately 80 to 95 percent, making it an essential tool for waste management in urban areas where landfill space is limited. By subjecting waste to high temperatures, incinerators also neutralize hazardous components and pathogens, ensuring that the remaining residue is stable and takes up minimal space.

Explanation

The greenhouse effect is a natural process that warms the Earth's surface. When the Sun's energy reaches the Earth's atmosphere, some of it is reflected back to space and the rest is absorbed and re-radiated by greenhouse gases. These gases, such as carbon dioxide, methane, nitrous oxide, and water vapor, trap heat in the atmosphere that would otherwise escape into space. This trapped heat acts like a thermal blanket around the planet, leading to a steady increase in the average temperature of the Earth's atmosphere and surface, a phenomenon commonly known as global warming. Under normal conditions, this effect is essential for maintaining a habitable climate, but human activities have intensified the concentration of these gases, resulting in an accelerated increase in global temperature.

Explanation

Natural gas is a naturally occurring hydrocarbon gas mixture consisting primarily of methane (CH₄). In most geological formations, methane constitutes approximately 70% to 90% of the total volume of natural gas. It is the simplest alkane and the primary energy-yielding component that undergoes combustion to produce heat and electricity. Because of this high concentration, the chemical and physical properties of natural gas are dominated by the behavior of methane.

Explanation

Diclofenac is a non-steroidal anti-inflammatory drug (NSAID) that was widely used in India as a veterinary painkiller for livestock. Vultures are highly susceptible to the toxicity of this drug when they feed on the carcasses of cattle that were recently treated with it. The drug causes acute renal failure in the birds, leading to a condition known as visceral gout, where uric acid crystals accumulate on internal organs. This toxicity resulted in a catastrophic population crash of over 99 percent in species like the Oriental white-backed vulture and the long-billed vulture starting in the 1990s. Due to its devastating ecological impact, the Government of India banned the veterinary use of diclofenac in 2006 to protect the remaining vulture populations and maintain the natural scavenging process essential for public health.

Explanation

China was the world largest emitter of CO₂ in 2015, accounting for approximately 28 to 29 percent of total global emissions. Its high emission levels were driven by rapid economic growth, intensive industrial manufacturing, and a heavy reliance on coal as a primary energy source for electricity generation. By the mid-2000s, China had surpassed the United States in total annual emissions, and by 2015, its carbon footprint was nearly double that of the next largest emitting nation. This significant share reflects the scale of the country energy consumption required to support its role as the global hub for manufacturing and heavy industry.

Explanation

Statement i is true because developing countries often experience higher vulnerability to natural disasters due to high population density, inadequate infrastructure, and limited financial resources for mitigation and recovery. Statement ii is true as the Bhopal gas tragedy of 1984 was an industrial disaster caused by the leak of methyl isocyanate gas from the Union Carbide India Limited pesticide plant, resulting from human error and safety failures. Statement iv is true because mangroves serve as natural coastal defenses; their complex root systems and dense vegetation dissipate the energy of storm surges and reduce the wind velocity of cyclones, thereby protecting inland areas from severe impact.

Explanation

Light travels at a constant velocity of approximately 299,792,458 meters per second in a vacuum. According to the special theory of relativity, this speed, denoted by c, represents the universal speed limit for the transmission of all energy, matter, and information. While particles such as electrons and the constituents of cosmic rays can reach relativistic speeds very close to the speed of light, they possess rest mass and thus require infinite energy to actually reach c. Light consists of massless photons, allowing it to move at this maximum possible velocity, which is significantly faster than the mechanical propagation of supersonic waves.

Explanation

Graphene is a two-dimensional nanostructure consisting of a single layer of carbon atoms arranged in a hexagonal honeycomb lattice. Since it has a thickness of only one atom (approximately 0.334 nm), it falls within the nanoscale dimension, making it a fundamental building block for other carbon nanomaterials like carbon nanotubes and fullerenes. This atomic-scale structure grants it extraordinary properties, including high electrical conductivity, thermal stability, and exceptional mechanical strength, positioning it as a critical material in nanotechnology and advanced electronics.

Explanation

The velocity of sound in a medium is determined by the formula v = √(E/ρ), where E represents the modulus of elasticity and ρ represents the density of the medium. In solid materials like steel, the atoms are bonded together with very high intermolecular strength, resulting in a high Young's modulus. This structural rigidity allows sound waves, which are mechanical longitudinal waves, to propagate through the material much faster than in fluids or gases. In steel, the velocity of sound is approximately 5960 meters per second, as the high elasticity of the metal more than compensates for its density in the velocity equation.

Explanation

Peroxyacetyl nitrate, commonly known as PAN, is a potent secondary pollutant found in photochemical smog. It is formed by the chemical reaction between nitrogen oxides and volatile organic compounds under the influence of ultraviolet radiation from sunlight. PAN is chemically represented by the formula CH₃CO₂ONO₂. It acts as a powerful lachrymator, meaning it stimulates the corneal nerves in the eyes to cause pain and tearing. Even at very low concentrations, PAN causes intense eye irritation and is a significant contributor to the respiratory distress associated with polluted urban air environments.

Explanation

Stephen Hawking, a world-renowned theoretical physicist and cosmologist, authored A Brief History of Time, which was first published in 1988. The book explores complex concepts in cosmology, such as the origins of the universe, the nature of time, and the physics of black holes, in a style intended for non-specialist readers. It became an international bestseller, remaining on the Sunday Times bestseller list for a record-breaking 237 weeks. Hawking sought to explain the Big Bang and general relativity while avoiding technical jargon, famously including only a single mathematical equation, E=mc², to maintain accessibility for a broad audience.

Explanation

Amla, scientifically known as Phyllanthus emblica, is exceptionally dense in Vitamin C, providing approximately 600 to 800 mg of ascorbic acid per 100 grams of edible fruit. The ascorbic acid in amla remains highly stable and bioavailable due to the presence of natural protectors like gallic acid and ellagic acid. These tannins prevent the oxidation of the vitamin during storage or processing, ensuring that the fruit retains its potent antioxidant properties and nutritional value. This high concentration makes it one of the most effective natural sources for maintaining immune function, collagen synthesis, and protecting cells from oxidative stress.

Explanation

Mars is considered the most viable planet for potential life due to its historical and current environmental conditions. It features a solid surface with evidence of past liquid water, including dried riverbeds and mineral deposits that only form in aqueous environments. In 2018, data from the Curiosity rover revealed the presence of complex organic molecules in Martian soil, providing evidence that the planet once had the chemical building blocks necessary for life. Furthermore, research published in 2018 using radar data from the Mars Express orbiter identified a large subglacial lake of liquid water beneath the southern polar ice cap. This discovery is significant because liquid water is a fundamental requirement for all known forms of life. The planet also possesses a thin atmosphere and seasonal cycles, making it a primary focus for astrobiological exploration.

Explanation

Albert Einstein was awarded the 1921 Nobel Prize in Physics for his services to Theoretical Physics, and especially for his discovery of the law of the photoelectric effect. In his 1905 paper, Einstein revolutionized the understanding of light by proposing that it is composed of discrete packets of energy called quanta, later known as photons. He formulated the mathematical law for this effect using the equation hf = Kₘₐₓ + Φ, where h is Planck's constant, f is the frequency of the incident light, Kₘₐₓ is the maximum kinetic energy of the emitted electrons, and Φ is the work function of the material. This explanation provided the first definitive evidence for the quantization of light and laid the groundwork for the field of quantum mechanics. The Nobel Committee specifically highlighted this contribution as it was a mathematically precise law that had been experimentally verified.

Explanation

Solar energy generates power by capturing sunlight using photovoltaic panels or solar thermal systems. This conversion process is purely physical and does not involve the combustion of any fuel or chemical reagents. Consequently, solar energy production releases zero greenhouse gases, toxic fumes, or particulate matter into the atmosphere. As it relies on the inexhaustible energy of photons from the sun, it functions as a clean energy source that preserves atmospheric integrity during the electricity generation stage.

Explanation

The Constitution of India does not formally classify the Directive Principles of State Policy into specific groups. However, for the purpose of analytical study and based on their underlying philosophy and content, constitutional experts traditionally categorize them into socialist, Gandhian, and liberal-intellectual principles. Socialist principles aim to establish a welfare state and ensure socio-economic justice. Gandhian principles represent the program of national reconstruction formulated by Mahatma Gandhi during the freedom struggle, such as the promotion of village panchayats and cottage industries. Liberal-intellectual principles reflect the ideology of liberalism, covering objectives like a uniform civil code, the separation of the judiciary from the executive, and the promotion of international peace. Since these three categories form the standard academic framework for studying these directives, they are all collectively applicable.

Explanation

Ashok Chandra, a distinguished civil servant and author of Indian Administration, characterized the Planning Commission as the Economic Cabinet of India. This description was based on the commission's pervasive influence over the nation's economic landscape and its centralized role in formulating five-year plans. Although established as a non-constitutional, advisory body through an executive resolution in 1950, it wielded immense power in determining plan priorities and allocating developmental resources. Chandra argued that its functioning often overshadowed the Union Cabinet and marginalized the constitutional role of the Finance Commission by making critical decisions on financial transfers and economic policies that effectively governed the country's fiscal direction.

Explanation

Justice P.N. Bhagwati is widely regarded as the pioneer of Public Interest Litigation (PIL) in India and is often referred to as the father of PIL in the Indian judicial system. During his tenure, he revolutionized judicial access by relaxing the traditional doctrine of locus standi, which originally mandated that only a person whose rights were directly violated could approach the court. By expanding this rule, he enabled any public-spirited individual or organization to seek legal remedies on behalf of the poor, marginalized, or those unable to approach the court themselves due to socio-economic constraints. Justice Bhagwati introduced the concept of epistolary jurisdiction, allowing the court to treat a simple letter or telegram addressed to it as a writ petition. His landmark rulings, particularly in the S.P. Gupta vs. Union of India case, institutionalized PIL as a tool for social change and the protection of fundamental rights. He served as the Chief Justice of India from July 1985 to December 1986.

Explanation

Sanjaya Baru is the author of the 2014 memoir titled The Accidental Prime Minister: The Making and Unmaking of Manmohan Singh. He served as the Media Adviser and chief spokesperson to Prime Minister Manmohan Singh during the first term of the United Progressive Alliance government from May 2004 to August 2008. The book provides an insider account of the functioning of the Prime Minister Office and discusses the internal political dynamics between the Prime Minister and the leadership of the Indian National Congress. It gained significant attention for its detailed portrayal of Dr. Singh's authority and the decision-making processes during his tenure.

Explanation

The Constituent Assembly of India held its final session on January 24, 1950. During this historic meeting, the members of the Assembly signed three official copies of the Constitution—one handwritten in English, one handwritten in Hindi, and one printed in English. This session was significant as it marked the formal conclusion of the Assembly's task of drafting the Constitution. On this day, the Assembly unanimously elected Dr. Rajendra Prasad as the first President of India. Furthermore, January 24, 1950, saw the official adoption of Jana Gana Mana as the National Anthem and Vande Mataram as the National Song. Following this meeting, the Constituent Assembly ceased to exist as a constitution-making body and was transformed into the Provisional Parliament of India until the first general elections were held in 1951-52.

Explanation

Article 169 of the Indian Constitution provides the specific procedure for the abolition or creation of Legislative Councils in states. While a Legislative Council is a permanent body and is not subject to dissolution—meaning it does not have a fixed term after which it must cease to exist and be reconstituted—it can be completely abolished by the Parliament. This process requires the State Legislative Assembly to pass a resolution by a special majority, followed by an Act of Parliament. This distinguishes it from the Council of States, which is a permanent body that can neither be dissolved nor abolished, and the House of the People or Legislative Assemblies, which are regularly dissolved.

Explanation

The Department of Women and Child Development was established in 1985 under the Ministry of HRD, later upgraded to an independent Ministry in 2006. Since options only go to 1988, the question refers to the Department's 1985 establishment. Correct answer: A (1985).

Explanation

Article 81 of the Constitution of India outlines the composition of the House of the People, commonly known as the Lok Sabha. As per Article 81(1)(b), the House shall consist of not more than twenty members to represent the Union Territories. These representatives are chosen by direct election from territorial constituencies in the Union Territories, as regulated by parliamentary law under the Union Territories (Direct Election to the House of the People) Act, 1965. This limit was established to maintain a balanced federal structure, ensuring that administrative units under the direct control of the Central Government have a defined maximum presence in the lower house of Parliament. Although the actual number of seats filled may vary based on delimitation and the number of existing territories, the constitutional ceiling remains fixed at twenty.

Explanation

The 2018 FIFA World Cup, held in Russia from 14 June to 15 July, featured a total of 32 national teams. This tournament format included 31 teams that secured their places through various continental qualifying competitions, along with Russia, which qualified automatically as the host nation. The 32 participants were divided into eight groups of four for the initial round-robin stage before proceeding to the knockout rounds. This 32-team structure remained the standard for FIFA World Cups from 1998 through the 2022 edition in Qatar.

Explanation

On May 11, 2018, Prime Minister Narendra Modi visited Nepal and jointly inaugurated the direct bus service between Janakpur and Ayodhya along with the Nepalese Prime Minister K.P. Sharma Oli. This event marked the official extension of the Ramayana Circuit into Nepal, which is a flagship initiative under the Swadesh Darshan Scheme of the Government of India. Janakpur is traditionally recognized as the birthplace of Goddess Sita, making it a critical geographical and spiritual node in the Ramayana. The inclusion of this site in the circuit aims to enhance pilgrimage tourism and strengthen the deep-rooted cultural and religious ties between India and Nepal.

Explanation

The Purvanchal Expressway is an access-controlled highway project in Uttar Pradesh designed to connect the state capital, Lucknow, with the eastern district of Ghazipur. According to the alignment finalized by the Uttar Pradesh Expressways Industrial Development Authority (UPEIDA), the 340.8 km long expressway traverses nine districts: Lucknow, Barabanki, Amethi, Sultanpur, Ayodhya (Faizabad), Ambedkar Nagar, Azamgarh, Mau, and Ghazipur. Basti is situated to the north of this route, primarily along the National Highway 27 corridor, and was not included in the geographical path of the Purvanchal Expressway project.

Explanation

The United Nations E-Government Survey 2018, published by the Department of Economic and Social Affairs, placed India at the 96th rank among 193 countries. This reflected a jump of 11 positions compared to the 2016 ranking where India stood at 107th. The E-Government Development Index (EGDI) is calculated as a weighted average of three normalized indices: the Online Service Index, which assesses the scope and quality of online services; the Telecommunication Infrastructure Index, which evaluates the status of ICT infrastructure; and the Human Capital Index, which measures literacy and schooling. India's improvement was driven by high scores in the Online Service Index, specifically in the sub-categories of digital service delivery and public participation through electronic means.

Explanation

The Nipah virus (NiV) outbreak was reported in May 2018 in the Kozhikode and Malappuram districts of Kerala. This was a significant public health event as it represented the first occurrence of the virus in South India. The outbreak was traced to fruit bats, which are the natural hosts of the virus, and it spread through direct contact with infected individuals or contaminated secretions. The state government and health authorities managed to contain the localized outbreak through intensive surveillance and isolation protocols, officially declaring the region free of the virus by early June 2018 after the incubation period of the last confirmed case had passed.

Explanation

The National Digital Library of India (NDLI) was formally dedicated to the nation by the then Union Human Resource Development Minister, Prakash Javadekar, on June 19, 2018, at an event held in New Delhi. Developed by the Indian Institute of Technology (IIT) Kharagpur under the aegis of the National Mission on Education through Information and Communication Technology (NMEICT), the project provides a single-window search facility to access a vast array of digital educational resources. It serves as a unified virtual repository that integrates content from various institutional repositories and provides free access to academic materials such as books, journals, and manuscripts in multiple languages to learners across the country.

Explanation

The Global Peace Index 2018, compiled by the Institute for Economics and Peace (IEP), ranked India 136th out of 163 independent states and territories. This index measures the relative position of nations' peacefulness based on twenty-three qualitative and quantitative indicators. These indicators are grouped into three primary domains: societal safety and security, the extent of ongoing domestic and international conflict, and the degree of militarisation. India's 136th rank in 2018 represented a slight improvement from its 137th position in the 2017 report, which was attributed to a marginal reduction in the level of violent crime and better management of internal conflicts during the assessment period.

Explanation

The 15th Pravasi Bhartiya Diwas convention was scheduled to be held in Varanasi, Uttar Pradesh, from January 21 to 23, 2019. Although this biennial event is traditionally celebrated on January 9 to commemorate Mahatma Gandhi’s return from South Africa in 1915, the dates for the 2019 edition were shifted to late January. This adjustment was made to allow the visiting delegates to attend the Kumbh Mela in Prayagraj and witness the Republic Day parade in New Delhi. Organized by the Ministry of External Affairs in partnership with the Government of Uttar Pradesh, the theme for this convention was Role of Indian Diaspora in building a New India. Prime Minister Pravind Jugnauth of Mauritius was invited as the chief guest for the event.

Explanation

The Cabinet Committee on Economic Affairs (CCEA) approved the Minimum Support Price (MSP) for all Kharif crops for the 2018-19 season on 4th July 2018. In line with the Union Budget 2018-19 commitment to provide farmers with a price that is at least 1.5 times the cost of production (A2+FL), the MSP for Paddy (Common) was increased to ₹1,750 per quintal. This represented an absolute increase of ₹200 per quintal over the previous year's price. The MSP for Paddy (Grade A) was also raised to ₹1,770 per quintal for the same period to ensure remunerative returns to the growers and encourage higher investment and production.

Explanation

Imran Khan, the chairman of the Pakistan Tehreek-e-Insaf (PTI) party, led his party to a major victory in the general elections held on July 25, 2018. The PTI emerged as the largest political force in the National Assembly, successfully campaigning on a mandate for governance reform and socio-economic change. Following the election results, Imran Khan secured the necessary support from coalition partners and independent candidates to attain a majority. He was subsequently elected by the National Assembly and took the oath of office as the 22nd Prime Minister of Pakistan on August 18, 2018, marking his first term in the country's highest executive office.

Explanation

The Ramon Magsaysay Award 2018 recognized two Indians among its six recipients for their exceptional contributions to society. Bharat Vatwani was honored for his tireless efforts in rescuing mentally ill individuals living on the streets and providing them with medical treatment and family reunification through his Shraddha Rehabilitation Foundation. Sonam Wangchuk received the award for his innovative systemic reforms in the educational sector and his work in harnessing community-driven scientific solutions, such as the Ice Stupa artificial glaciers, to improve life in the high-altitude region of Ladakh.

Explanation

The 10th BRICS summit was held in Johannesburg, South Africa, from 25 to 27 July 2018. This meeting marked the completion of the first decade of BRICS summits, with South Africa serving as the host nation for the second time in the history of the bloc. The theme for the 2018 summit was BRICS in Africa: Collaboration for Inclusive Growth and Shared Prosperity in the 4th Industrial Revolution. During the event, leaders from the five member states discussed strengthening multilateralism and enhancing economic cooperation. The resulting Johannesburg Declaration emphasized the importance of a rules-based international trading system and collective efforts toward sustainable development and global peace.

Explanation

The Shukla Yajur Veda, also known as the White Yajur Veda, is represented by the Vajasaneyi Samhita. This Samhita is named after the sage Yajnavalkya, who was the son of Devarata and was also known as Vajasaneya. The term Shukla signifies that the mantras in this collection are pure and separate from the prose explanations or Brahmanas, distinguishing it from the Krishna Yajur Veda where the mantras and prose are intermingled. It contains the liturgical formulas necessary for the performance of various Vedic sacrifices and is widely followed in Northern and Western India through its Madhyandina and Kanva recensions.

Explanation

The Turkish invasions of India, primarily led by Mahmud of Ghazni and Muhammad Ghori, were successful due to the prevailing political conditions in the Indian subcontinent during the 11th and 12th centuries. North India was fragmented into numerous small, independent Rajput kingdoms that were frequently engaged in internecine warfare and territorial disputes. This systemic political disunity and the absence of a centralized sovereign authority prevented these rulers from forming a permanent or effective military coalition against foreign threats. The Turkish forces were able to exploit these rivalries and defeat the Indian states individually. Therefore, the lack of political unity was a direct and critical factor that facilitated the success of the Turkish campaigns and the eventual establishment of the Delhi Sultanate.

Explanation

The chronological progression of these South Indian temples follows the transition from Pallava rock-cut architecture to structural Chola architecture. The Sapt Pagoda, referring to the monolithic Rathas of Mahabalipuram, was commissioned by the Pallava king Narasimhavarman I (Mamalla) in the mid-7th century CE. The Shore Temple at Mahabalipuram marks the next phase as a structural temple built by the Pallava king Narasimhavarman II (Rajasimha) in the early 8th century CE. Moving to the Chola period, the Brihadishwara Temple in Thanjavur was completed by Rajaraja Chola I around 1010 CE. Finally, the Gangaikonda Cholapuram Temple was constructed by his son, Rajendra Chola I, and completed around 1035 CE to commemorate his military expeditions to the Ganges.

Explanation

The Hathigumpa inscription, located in the Udayagiri hills near Bhubaneswar, Odisha, is the principal historical record for King Kharavela of the Mahameghavahana dynasty. Written in the Prakrit language using the Brahmi script, the inscription provides a detailed chronological account of Kharavela's thirteen-year reign during the 2nd or 1st century BCE. It documents his significant military achievements across India, his extensive public works such as the expansion of irrigation canals, and his generous patronage of the Jain faith. As a rare biographical epigraph from the post-Mauryan era, it serves as the definitive source for reconstructing the history and achievements of this Kalinga monarch.

Explanation

The Muslim League initially accepted the Cabinet Mission Plan in June 1946 because it perceived the compulsory grouping of provinces as a stepping stone toward Pakistan. However, on July 29, 1946, the League passed a resolution withdrawing its acceptance. This decision was triggered by Jawaharlal Nehru's press statement on July 10, where he asserted that the Congress was free to change the grouping scheme once it entered the Constituent Assembly. Separately, while the League initially refused to join the Interim Government formed in September 1946, they were later persuaded by Viceroy Lord Wavell to join in October 1946 to ensure their interests were represented and to prevent a Congress monopoly on power. Although both statements are historically true, the participation in the Interim Government was a subsequent political maneuver and does not provide the causal reason for the earlier withdrawal of support for the Cabinet Mission Plan.

Explanation

Bagor, situated on the Kothari river in the Bhilwara district of Rajasthan, is the largest and best-documented Mesolithic site in India. Excavated by V.N. Misra, the site provides some of the earliest evidence of animal domestication in the Indian subcontinent, dating back to approximately 5000-4500 BCE. The faunal remains recovered from Bagor include bones of domesticated sheep, goats, and cattle, indicating a transition from a purely hunting-gathering lifestyle to a pastoral economy. Alongside Adamgarh in Madhya Pradesh, Bagor serves as a primary archaeological reference for understanding the shift toward animal husbandry during the Mesolithic period. The site also yielded an extensive collection of microliths and evidence of paved floors and stone tools used by its prehistoric inhabitants.

Explanation

The Adina Masjid is located in Pandua, West Bengal, rather than Mandu. It was commissioned by Sikandar Shah, the second Sultan of the Ilyas Shahi dynasty, and completed around 1374-75 AD. At the time of its construction, it was the largest mosque in the Indian subcontinent and remains a premier example of the Bengal Sultanate style of architecture, characterized by its extensive use of brick and stone carvings. Mandu, located in Madhya Pradesh, is instead famous for the Malwa Sultanate's architectural contributions, such as the Jama Masjid and the Jahaz Mahal.

Explanation

Wood's Despatch (C) was issued in 1854 and is known as the Magna Carta of English Education in India for establishing a comprehensive system from primary schools to universities. The Hunter Commission (A) followed in 1882 to evaluate the implementation of the 1854 Despatch, with a specific focus on the state of primary and secondary education. The Sadler Commission (B), or the Calcutta University Commission, was appointed in 1917 to investigate the problems of Calcutta University and proposed significant changes to the school and university structure. The Sargeant Plan (D) was a comprehensive report on post-war educational development in India prepared by the Central Advisory Board of Education in 1944. The chronological sequence is Wood's Despatch (1854), Hunter Commission (1882), Sadler Commission (1917), and Sargeant Plan (1944).

Explanation

Vinayak Damodar Savarkar, along with his brother Ganesh Damodar Savarkar, founded the Abhinav Bharat Society in 1904. Originally established as the Mitra Mela in Nasik in 1899, the organization was rebranded as the Abhinav Bharat Society (Young India Society) to advocate for the removal of British rule through armed struggle. Inspired by Giuseppe Mazzini's Young Italy, the society attracted numerous revolutionaries and was instrumental in orchestrating underground activities against the colonial administration in Maharashtra and London. Its members were involved in significant events such as the Nasik Conspiracy Case of 1909, which eventually led to the arrest and deportation of the Savarkar brothers to the Cellular Jail in the Andaman Islands.

Explanation

The Ahom revolt took place in 1828 in Assam, led by Gomdhar Konwar. This uprising was a response to the British East India Company's decision to annex the Ahom territories instead of returning them to the native rulers after the First Anglo-Burmese War (1824–1826) and the subsequent Treaty of Yandabo. The rebels declared Gomdhar Konwar as their king and moved toward Rangpur, but the movement was eventually quelled by the British military. The year 1815 is historically inaccurate for this rebellion as it predates the British intervention in the region and the conflict that triggered the revolt.

Explanation

Kunchikal Falls is located in the Shimoga district of Karnataka and is formed by the Varahi River. It has a total height of approximately 455 meters (1,493 feet), making it the highest waterfall in India. It is a tiered or cascade waterfall, where the water descends over a series of rocky steps rather than falling in a single vertical drop. The height measurements provided by the World Waterfall Database and official geographical records categorize it as the tallest in the country. The waterfall's flow is regulated by the Mani Dam, which is situated in its vicinity and used for hydroelectric power generation.

Explanation

Vladimir Koppen based his empirical climate classification system on the principle that natural vegetation is the best expression of the climate of a region. He believed that vegetation integrates all the effects of temperature, precipitation, and seasonality, effectively acting as a biological instrument that summarizes the climatic conditions of an area. To define his climate boundaries, Koppen utilized the global vegetation zones identified by the botanist Alphonse de Candolle, such as megatherms and mesotherms. By correlating these biological distributions with quantitative meteorological data, he established that the distribution of plants serves as the true index or mirror of the underlying climate. This approach allowed him to categorize the world into climatic zones where the boundaries were determined by the physiological requirements and tolerances of specific plant types.

Explanation

The Pampas are vast, fertile plains located primarily in central Argentina, covering over 750,000 square kilometers across provinces like Buenos Aires, La Pampa, Santa Fe, and Cordoba. This biome is characterized by a temperate climate and deep, nutrient-rich soils, making it one of the most productive agricultural regions in the world. Historically and economically, the Pampas serve as the agricultural heartland of Argentina, supporting intensive cattle ranching and the large-scale cultivation of cereal crops like wheat and maize. The region’s flat topography and lack of trees, except for those planted by humans, are defining features of this South American grassland ecosystem.

Explanation

The Gibson Desert is located in the interior of Western Australia, positioned between the Great Sandy Desert to the north and the Great Victoria Desert to the south. It is one of Australia's major deserts, covering about 155,000 square kilometers of arid terrain. Brazil is a South American nation and does not contain this desert. The Gibson Desert was named by the explorer Ernest Giles after Alfred Gibson, a member of his 1874 expedition who tragically disappeared while searching for water in the region.

Explanation

According to the production data from the International Coffee Organization (ICO) for the year 2016, Vietnam was the second-largest coffee producer in the world, following Brazil. Vietnam primarily produces Robusta coffee and recorded a production volume of approximately 25 to 28 million 60kg bags during that period. Colombia, which is known for its high-quality Arabica coffee, ranked as the third-largest producer globally with a production volume of roughly 14 to 14.5 million 60kg bags. Therefore, when arranged in descending order of production quantity, Vietnam ranks higher than Colombia.

Explanation

The Suez Canal is an artificial sea-level waterway in Egypt that connects the Mediterranean Sea to the Red Sea through the Isthmus of Suez. It was officially opened in November 1869, providing a direct maritime route between Europe and South Asia. Before its construction, ships traveling from Europe to India had to navigate around the southern tip of Africa via the Cape of Good Hope. The opening of the canal eliminated this necessity, effectively shortening the travel distance between major ports like Mumbai and London by approximately 7,000 km. This significant reduction in distance led to a substantial decrease in travel time, fuel consumption, and transportation costs, facilitating global trade and strengthening economic ties between India and the Western world.

Explanation

The India Meteorological Department (IMD) was established in 1875 with its first headquarters at Calcutta (B) following the 1864 cyclone. As the department expanded, the headquarters were shifted to Simla (C) in 1905 to better manage operations from the summer capital of British India. Later, in 1928, the headquarters were moved to Poona (D) to take advantage of its central location and suitable environment for scientific research and observations. Finally, the headquarters were relocated to New Delhi (A) in 1944 during the Second World War for better coordination with the central government. The chronological sequence of the establishment of these headquarters is Calcutta (1875), Simla (1905), Poona (1928), and New Delhi (1944).

Explanation

Black soil is primarily concentrated in the Deccan Trap region of peninsular India, covering states such as Maharashtra, Gujarat, and Madhya Pradesh. It is a residual soil formed from the weathering of basaltic lava rocks originating from volcanic activity. The Himalayan region, conversely, is characterized by mountainous and forest soils. These soils are typically thin, immature, and acidic, formed through the weathering of sedimentary and metamorphic rocks under alpine or sub-alpine conditions. The geological composition and climatic environment of the Himalayas are not conducive to the formation of the moisture-retentive, clayey black soil found in the lava plateaus of the south.

Explanation

The McMahon Line serves as the frontier between India and China, specifically demarcating the boundary between the Indian state of Arunachal Pradesh and the Tibet Autonomous Region. It was determined as part of the Simla Accord, a treaty signed in 1914 between representatives of Great Britain and Tibet. The line is named after Sir Henry McMahon, who was the chief negotiator of the convention and the foreign secretary of British India at the time. It stretches for about 890 kilometers through the high ridges of the Himalayan region. Following the independence of India, the Indian government accepted the McMahon Line as its official international border in the eastern sector, though it remains a subject of territorial dispute as China maintains that Tibet was not a sovereign state at the time of the signing and thus lacked the authority to conclude an international treaty.

Explanation

The Mississippi River is the most prominent example of a bird foot delta, characterized by long, narrow distributary channels that extend far into the sea. This formation occurs because the river carries a massive volume of fine-grained sediment and discharges it into the relatively calm, low-energy waters of the Gulf of Mexico. The deposition of sediment along the margins of these distributaries forms natural levees that project outward, resembling the splayed toes of a bird. Unlike arcuate deltas, the bird foot delta is dominated by fluvial processes rather than wave or tidal action, allowing the river-fed fingers to advance deep into the marine basin.

Explanation

The natural growth of population is defined as the difference between the number of live births and the number of deaths in a specific region during a given time period. It represents the change in population size purely due to biological factors, excluding the influence of migration. The formula for natural growth is Natural Growth = Births - Deaths. When births are more than deaths, there is a natural increase, and when deaths are more than births, there is a natural decrease. In contrast, actual growth of population takes into account both natural growth and net migration, which is the difference between in-migration and out-migration. Thus, the birth rate and death rate are the only components that determine the natural growth of a population.

Explanation

The United Nations Development Programme (UNDP) introduced the Human Development Index (HDI) in its first Human Development Report published in 1990. Developed by economists Mahbub ul Haq and Amartya Sen, the index was designed to shift the focus of development economics from national income accounting to people-centered policies. It provides a composite measure of three basic dimensions of human development: a long and healthy life, access to knowledge, and a decent standard of living. By using indicators such as life expectancy at birth, mean years of schooling, and gross national income per capita, the UNDP established a standardized method to compare the level of human progress across different nations.

Explanation

The Mahatma Gandhi National Rural Employment Guarantee Act (MGNREGA), enacted in 2005 and launched in 2006, is the largest social security and rural employment scheme in the world. It provides a legal guarantee for at least 100 days of wage employment in a financial year to every rural household whose adult members volunteer to do unskilled manual work. As of 2018, the program reached every rural district in India, functioning as a demand-driven scheme that ensures a basic livelihood for the rural poor while creating durable assets like roads, canals, and ponds. Its massive budgetary allocation and the hundreds of millions of person-days of work it generates annually establish it as the primary instrument for rural employment and poverty alleviation in the country.

Explanation

The Lorenz curve is a graphical representation developed by Max O. Lorenz in 1905 to visualize the distribution of income or wealth within a population. It plots the cumulative percentage of total income received against the cumulative percentage of recipients, starting from the poorest. In a perfectly equal society, the curve would be a straight 45-degree diagonal known as the Line of Perfect Equality, where n percent of the population earns exactly n percent of the income. The extent to which the actual Lorenz curve deviates or bows away from this diagonal line indicates the degree of inequality present in the economy. This curve serves as the basis for calculating the Gini coefficient, which is the ratio of the area between the line of equality and the Lorenz curve to the total area under the line of equality. A greater curvature implies a higher concentration of wealth or income among a smaller percentage of the population.

Explanation

Haryana presents a notable socio-economic paradox where high financial prosperity coincides with poor gender indicators. According to the 2011 Census, Haryana recorded the lowest sex ratio among all Indian states at 879 females per 1000 males, well below the national average of 943. From an economic perspective, Haryana is one of India's most developed states, consistently ranking at the top in terms of Per Capita Income. In the years leading up to 2018, the state maintained one of the highest Per Capita Income levels in the country, driven by its robust agricultural sector and the rapid industrial and service sector growth in regions like Gurugram. This contrast makes it the primary example of a state that is economically advanced but socially lagging in gender balance.

Explanation

The 73rd Constitutional Amendment Act provides the legal framework for the devolution of financial powers to Panchayati Raj Institutions. Article 243-H of the Indian Constitution empowers State Legislatures to authorize Gram Panchayats to levy, collect, and appropriate specific taxes, duties, tolls, and fees. Among these, the tax on local fairs, weekly markets, and festivals is a standard revenue source collected by Gram Panchayats. This revenue is utilized for providing local civic amenities and managing the infrastructure required for such community gatherings within the village jurisdiction.

Explanation

The 12th Five Year Plan, which spanned the period from 2012 to 2017, was launched with the specific official theme of Faster, More Inclusive and Sustainable Growth. While previous plans emphasized economic expansion and poverty reduction, the 12th Plan explicitly integrated environmental sustainability into the core macroeconomic framework. It aimed to achieve a growth process that was not only rapid and socially inclusive but also ecologically balanced to ensure long-term resource availability. This focus involved targets related to increasing forest cover, improving energy efficiency, and managing water resources more effectively to mitigate the impact of climate change while maintaining industrial and agricultural momentum.

Explanation

The Smart Cities Mission was launched by the Central Government in June 2015 with the objective of developing 100 sustainable and citizen-friendly cities across India. Ghaziabad was not included in the final list of 100 cities selected for this central programme through the competitive City Challenge rounds. Although multiple cities from Uttar Pradesh were eventually approved for the mission, Ghaziabad did not secure a place in the selection rounds conducted by the Ministry of Housing and Urban Affairs.

Explanation

The National Family Health Survey (NFHS-4), conducted in 2015-16, recorded India's Total Fertility Rate (TFR) at 2.2. This metric represents the average number of children a woman would have during her reproductive years, typically defined as ages 15 to 49, based on the age-specific fertility rates observed during the survey period. The 2015-16 data showed a notable decline from the TFR of 2.7 reported in the previous NFHS-3 cycle from 2005-06. The findings indicated that India was approaching the replacement level fertility rate of 2.1, which is the level at which a population exactly replaces itself from one generation to the next without migration. The survey further detailed that the TFR in urban areas had fallen to 1.8, while in rural areas it stood at 2.4.

Explanation

The Hashim Committee, officially known as the Expert Group to Recommend the Detailed Methodology for Identification of Families Living Below Poverty Line in the Urban Areas, was constituted by the Planning Commission of India in May 2010. Chaired by Professor S.R. Hashim, the committee was tasked with developing a robust framework for identifying urban poor households to ensure effective targeting of government welfare schemes. It submitted its final report in 2012, recommending a multidimensional approach that categorized urban poverty through three types of vulnerabilities: residential, occupational, and social. This methodology allowed for a more nuanced identification of the urban BPL population beyond simple income or expenditure metrics.

Explanation

The India State of Forest Report 2017, published by the Forest Survey of India, provides a biennial assessment of the country forest resources. According to this report, the forest cover of India was measured at 7,08,273 square kilometers, which represents 21.54 percent of the total geographical area of 32,87,263 square kilometers. This figure specifically accounts for forest cover, which includes all lands with a tree canopy density of more than 10 percent and an area of more than one hectare. While the total forest and tree cover combined reached 24.39 percent, the forest cover component alone stood at the 21.54 percent mark. The data for this assessment was derived from the digital interpretation of satellite data from the Indian Remote Sensing satellite, Resourcesat-2, using a scale of 1:50,000.

Explanation

Project Tiger was officially launched on April 1, 1973, by Prime Minister Indira Gandhi at Jim Corbett National Park in Uttarakhand (then Uttar Pradesh). It was the first dedicated wildlife conservation programme in India, starting with nine tiger reserves covering about 18,278 sq km. The year 1972 refers to the Wildlife Protection Act, which provided the legal framework, not the launch of Project Tiger itself.

Explanation

Anthropogenic biomes, also known as anthromes or human biomes, represent the terrestrial biosphere in its contemporary form, where ecological patterns are primarily shaped by human populations and their use of land. Unlike natural biomes, which are defined by climate and vegetation, anthropogenic biomes are characterized by human-induced changes to the environment. Cropland is a definitive example of an anthropogenic biome because it is an ecosystem created, managed, and maintained by human activity for agricultural production. These landscapes involve the deliberate replacement of natural vegetation with specific crops, the modification of soil properties through tillage and fertilization, and the regulation of water through irrigation, reflecting a direct and sustained human transformation of the Earth's surface.

Explanation

The Kangaroo rat possesses the most extreme adaptations for water conservation among mammals, allowing it to survive its entire life cycle without ever drinking liquid water. It fulfills its total physiological water requirement through metabolic water, which is produced internally as a byproduct of the oxidation of carbohydrates and fats during the digestion of dry seeds. To minimize water loss, the Kangaroo rat has evolved highly efficient kidneys that produce urine many times more concentrated than that of other animals, and it stays in humid burrows during the day to reduce evaporative loss from the skin and lungs.

Explanation

The National Centre for Marine Biodiversity (NCMB) is India's first research institute dedicated to the study and conservation of marine biodiversity. It is located in Jamnagar, Gujarat, and was established under a Public-Private Partnership (PPP) model between the Ministry of Environment, Forest and Climate Change and Reliance Industries Limited. The center is situated near the Marine National Park in the Gulf of Kutch, which is India's first marine protected area. Its primary objective is to safeguard coastal and marine ecosystems through scientific research, documentation of marine species, and the development of specialized conservation strategies for the country's extensive coastline.

Explanation

Dachigam National Park, located near Srinagar in Jammu and Kashmir, is globally recognized as the primary and last viable habitat of the Hangul, also known as the Kashmir Stag. The Hangul (Cervus elaphus hanglu) is a critically endangered subspecies of the European red deer and serves as the state animal of Jammu and Kashmir. The park was originally established to ensure a clean water supply for Srinagar and was later designated as a protected area to conserve this unique deer species. The park's diverse terrain, ranging from coniferous forests to alpine meadows, provides the specific ecological niche and temperate environment required for the survival and seasonal migration of the remaining Hangul population.

Explanation

The International Day for Biological Diversity, also known as World Biodiversity Day, is observed annually on May 22. This date was officially designated by the United Nations General Assembly in December 2000 to increase global awareness and understanding of biodiversity issues. The selection of May 22 commemorates the adoption of the text of the Convention on Biological Diversity (CBD) on May 22, 1992, during the Nairobi Conference. The observance highlights the importance of protecting the Earth's diverse ecosystems, species, and genetic resources, which are essential for maintaining life-sustaining services and achieving global sustainable development goals.

Explanation

The term edaphic refers specifically to the conditions and characteristics of the soil that influence the growth and distribution of plants and other organisms. Derived from the Greek word edaphos, meaning ground or soil, edaphic factors are abiotic components of an ecosystem that include soil texture, structure, chemical composition, pH levels, and moisture content. These properties determine the availability of nutrients and water, which in turn dictates the types of vegetation and microbial life that can be sustained in a particular geographic area. The branch of soil science that investigates these influences of soil on living things is known as edaphology.

Explanation

The stratosphere contains approximately 90% of the atmospheric ozone, forming a region often referred to as the ozonosphere or the ozone layer. This concentration is highest at altitudes between 15 km and 35 km above the Earth's surface. Ozone in this layer is formed through the Chapman cycle, where solar ultraviolet radiation breaks down oxygen molecules (O₂) into individual atoms that subsequently react with other O₂ molecules to create ozone (O₃). This layer plays a vital role in protecting life on Earth by absorbing the majority of the Sun's harmful ultraviolet-B radiation. The atmospheric pressure and temperature conditions in the stratosphere are uniquely suited for maintaining this high concentration relative to the rest of the atmosphere.

Explanation

Global warming leads to an increase in Sea Surface Temperatures (SSTs) and a higher concentration of water vapor in the troposphere. According to the Clausius-Clapeyron relationship, a warmer atmosphere holds more moisture, which increases the potential for intense precipitation and provides more latent heat to fuel atmospheric disturbances. Cyclones, hurricanes, and various types of storms are driven by this thermal energy. As the oceans absorb more than 90 percent of the excess heat trapped by greenhouse gases, the energy available for these tropical and extra-tropical systems increases. This results in more rapid intensification, higher sustained wind speeds, and a greater frequency of high-intensity categories. The thermodynamic changes associated with a warming planet directly contribute to the increasing severity and occurrence of these extreme weather events.

Explanation

Botanical gardens are categorized as ex-situ conservation because they involve the protection and maintenance of plant species outside their natural habitats. In this strategy, living plant specimens are collected from the wild and cultivated in a man-made, controlled environment for the purposes of scientific research, education, and the preservation of biodiversity. Unlike in-situ methods that protect the entire ecosystem where a species naturally occurs, botanical gardens provide a specialized facility where species can be managed and propagated under human supervision to prevent extinction.

Explanation

Ozone is produced in the atmosphere through photochemical reactions triggered by ultraviolet radiation. In the stratosphere, high-energy UV-C rays strike oxygen molecules (O₂), breaking the chemical bonds and splitting them into two individual, highly reactive oxygen atoms. These free oxygen atoms then collide and bond with other diatomic oxygen molecules to form ozone (O₃). This continuous cycle, known as the Chapman cycle, is responsible for the formation and maintenance of the ozone layer. Furthermore, at the ground level, ultraviolet radiation reacts with anthropogenic pollutants such as nitrogen oxides and volatile organic compounds to produce tropospheric ozone, which is a primary constituent of photochemical smog.

Explanation

Norman Borlaug, widely recognized as the father of the Green Revolution, was awarded the Nobel Peace Prize in 1970. His pioneering work in developing high-yielding, disease-resistant semi-dwarf wheat varieties helped avert global famine during the mid-20th century, particularly in developing nations like India and Pakistan. The Nobel Committee honored him for his contributions to world peace through the improvement of food security, as the elimination of hunger is considered a fundamental prerequisite for social and political stability. Since the Nobel Prize does not include a specific category for agriculture, his humanitarian impact on global civilization was recognized through the Peace prize.

Explanation

Jayant Vishnu Narlikar, a renowned Indian astrophysicist and a proponent of scientific temper, has consistently classified astrology as a pseudoscience rather than a legitimate science. He argues that astrology lacks the essential characteristics of scientific inquiry, such as a testable theoretical framework, empirical evidence, and reproducibility. According to Narlikar, scientific disciplines must be subject to falsification and rigorous statistical testing, criteria that astrology fails to meet as its predictions often lack consistency and a demonstrable physical mechanism connecting celestial movements to human affairs. He has frequently advocated for the critical evaluation of such belief systems to distinguish them from established scientific fields that rely on the scientific method.

Explanation

Wilhelm Conrad Roentgen, a German physicist, discovered X-rays in 1895 while performing experiments with cathode rays using a Crookes tube. He noticed that a screen coated with barium platinocyanide in his laboratory began to fluoresce even though the tube was encased in heavy black cardboard. He concluded that a new type of invisible electromagnetic radiation was being emitted, which he named X-rays to denote their unknown nature. Roentgen soon produced the first medical X-ray image, showing the internal bone structure of his wife's hand. This invention fundamentally transformed the field of medicine by enabling non-invasive internal imaging of the human body. For this groundbreaking achievement, Roentgen was awarded the inaugural Nobel Prize in Physics in 1901.

Explanation

James Watson and Francis Crick proposed the double helix model of DNA in 1953. Their structural model was primarily based on X-ray diffraction images of DNA fibers produced by Rosalind Franklin and Maurice Wilkins. They identified that the DNA molecule consists of two long strands of nucleotides coiled around each other, forming a spiral staircase-like structure. The two strands are held together by specific base pairing between adenine and thymine, and cytosine and guanine, through hydrogen bonds. This model provided a clear mechanism for how genetic information is stored and replicated in living organisms. For this discovery, Watson and Crick were awarded the Nobel Prize in Physiology or Medicine in 1962.

Explanation

The energy of electromagnetic radiation is governed by the Planck-Einstein relation, E = hν, where E is the photon energy, h is Planck's constant, and ν is the frequency. Since frequency is inversely proportional to wavelength (λ) through the equation ν = c/λ, the energy can also be expressed as E = hc/λ. This formula demonstrates that radiation with a higher frequency or a shorter wavelength carries more energy. Within the electromagnetic spectrum, the sequence of radiations in order of increasing energy is radio waves, microwaves, infrared, visible light, ultraviolet, X-rays, and gamma rays. Among the provided options, X-rays have the highest frequency and the shortest wavelength, typically ranging from 0.01 to 10 nanometers. Consequently, X-rays possess the maximum energy per photon compared to ultraviolet rays, visible light, and infrared rays.

Explanation

Methane (CH₄) is a potent greenhouse gas produced primarily through anaerobic decomposition of organic matter by methanogenic bacteria. Paddy fields are a major anthropogenic source of methane because the waterlogged soil creates an oxygen-free environment conducive to methanogenesis. During the rice growing season, organic matter in the soil is broken down, and the resulting methane is released into the atmosphere through the rice plants. Similarly, termites are a significant biological source of methane. The digestive tracts of termites harbor specialized anaerobic microorganisms that ferment cellulose and other organic materials, producing methane as a byproduct of their metabolic processes. Therefore, both rice cultivation and the biological activity of termites contribute to the atmospheric concentration of methane.

Explanation

Silicon is a chemical element with the atomic number 14 and belongs to Group 14 of the periodic table. It is classified as a metalloid, possessing properties characteristic of both metals and non-metals. The electrical conductivity of silicon is intermediate between that of a metallic conductor and an insulator, which defines its role as a semiconductor. In a pure crystalline state, silicon atoms form covalent bonds in a lattice structure where each atom shares its four valence electrons with neighboring atoms. While it acts as an insulator at absolute zero, thermal energy at room temperature allows a small fraction of electrons to transition from the valence band to the conduction band. This intrinsic semiconducting property, combined with the ability to precisely tune its conductivity through the process of doping with other elements, makes silicon the primary material for manufacturing transistors, integrated circuits, and solar cells.

Explanation

The Preamble of the Constitution of India outlines the fundamental objectives of the state and the rights of its citizens in a specific sequence. Justice is mentioned first and is categorized into three distinct types: social, economic, and political. Following justice, the Preamble guarantees liberty in five specific forms: liberty of thought, expression, belief, faith, and worship. Equality is then defined through two aspects: equality of status and of opportunity. Finally, the Preamble promotes fraternity as a single overarching principle to ensure the dignity of the individual and the unity and integrity of the nation. This results in the numerical sequence of 3, 5, 2, and 1 respectively.

Explanation

For the 2017 Presidential election, the United Progressive Alliance (UPA) and a coalition of seventeen opposition parties nominated Meira Kumar as their joint candidate. A former diplomat and seasoned politician, Meira Kumar achieved the distinction of being the first female Speaker of the Lok Sabha, serving from 2009 to 2014. Her candidacy was positioned as a battle of ideologies against the National Democratic Alliance (NDA) nominee, Ram Nath Kovind. Although she received the highest number of electoral votes ever recorded by a losing candidate in an Indian presidential election, she was defeated by Kovind, who secured the majority of votes from the electoral college to become the 14th President of India.

Explanation

Arvind Panagariya was appointed as the inaugural Vice Chairman of the NITI Aayog in January 2015, following the government's decision to replace the 65-year-old Planning Commission with a new policy think tank. An eminent Indian-American economist and professor at Columbia University, Panagariya played a crucial role in establishing the organizational structure and strategic direction of the institution. During his tenure, he focused on fostering cooperative federalism and designing long-term policy frameworks for the Indian economy. He served in this capacity until August 2017, overseeing the transition from the traditional five-year planning model to a more dynamic three-year action agenda.

Explanation

Andhra Pradesh was the first state in independent India to be formed on a linguistic basis. The demand for a separate state for Telugu-speaking people gained momentum after the death of the activist Potti Sriramulu, who succumbed after a 56-day hunger strike in 1952. In response to the subsequent widespread agitation, the Government of India announced the creation of Andhra State by separating the Telugu-speaking areas from the Madras State. The new state was officially inaugurated on October 1, 1953, with Kurnool as its capital. This significant event paved the way for the broader reorganization of Indian states along linguistic lines under the States Reorganisation Act of 1956.

Explanation

NITI Aayog (National Institution for Transforming India) is an extra-constitutional and non-statutory body because it was established through an executive resolution of the Union Cabinet on January 1, 2015. It replaced the Planning Commission, which had a similar legal status. An extra-constitutional body is one that is not defined or mentioned within the text of the Constitution of India. Since NITI Aayog was created neither by a constitutional provision nor by an Act of Parliament, it exists as an advisory wing of the executive branch. It functions as the premier policy think tank of the Government of India, providing directional and policy inputs to foster cooperative federalism through a bottom-up approach in the multi-tier governance structure of the country.

Explanation

The Sarkaria Commission was set up by the Government of India in June 1983 under the chairmanship of Justice Ranjit Singh Sarkaria, a retired judge of the Supreme Court of India. Its primary mandate was to examine the relationship and balance of power between state and central governments in the country and suggest changes within the framework of the Constitution. The commission spent several years reviewing the working of the existing arrangements between the Union and the States in all spheres, including legislative, executive, and financial matters. In its final report submitted in 1988, it made 247 specific recommendations aimed at strengthening federalism, such as the setting up of a permanent Inter-State Council under Article 263 and guidelines for the appointment of Governors and the use of Article 356.

Explanation

Great Britain is recognized as the Mother of Parliaments because the modern parliamentary system of government evolved there over several centuries. The foundations were laid with the Magna Carta in 1215, which limited the absolute power of the monarch, and were further solidified by the Bill of Rights in 1689 following the Glorious Revolution. The system transitioned into its contemporary form during the 18th and 19th centuries as executive power shifted from the Crown to a Cabinet of ministers responsible to the elected House of Commons. This Westminster model, characterized by the fusion of executive and legislative powers and the leadership of a Prime Minister, served as the prototype for parliamentary democracies established across the globe.

Explanation

Under Article 312 of the Constitution of India, the Rajya Sabha is granted the exclusive power to initiate the creation of one or more All India Services common to the Union and the States. This process requires the Council of States to pass a resolution supported by not less than two-thirds of the members present and voting, declaring that such a step is necessary or expedient in the national interest. This special provision exists because the Rajya Sabha represents the states, and since All India Services affect the administrative jurisdiction and federal autonomy of the states, their creation requires the specific consent of the upper house before Parliament can legislate on the matter.

Explanation

Part II of the Constitution of India, comprising Articles 5 to 11, contains the provisions relating to citizenship. These articles identify the various categories of persons who were deemed citizens of India at the time of the commencement of the Constitution on January 26, 1950. Because the Constitution did not provide permanent or elaborate provisions for the acquisition or loss of citizenship after its commencement, Article 11 specifically empowers the Parliament of India to regulate the right of citizenship by law. Consequently, the Parliament enacted the Citizenship Act, 1955, which provides for the acquisition and termination of citizenship in the post-independence era.

Explanation

Article 343 of the Indian Constitution designates Hindi in Devanagari script as the official language of the Union, while initially allowing the use of English for fifteen years. However, Article 343(3) specifies that Parliament may by law provide for the continued use of the English language or the Devanagari form of numerals for specified purposes even after this period. Since the Constitution uses the phrase Parliament may by law provide, such changes are effected through the ordinary legislative process. This means they require only a simple majority of the members present and voting in both Houses of Parliament. These types of amendments are considered outside the formal scope of Article 368, which typically requires a special majority for more fundamental constitutional changes.

Explanation

Article 101(4) of the Constitution of India provides that if a Member of Parliament is absent from all meetings of the House for a continuous period of sixty days without obtaining permission, the House has the authority to declare the seat vacant. This period of sixty days is calculated by excluding any time during which the House is prorogued or adjourned for more than four consecutive days. This rule is designed to ensure the active participation of elected representatives in the legislative process and to prevent prolonged absenteeism without valid reasons or prior notification to the Presiding Officer.

Explanation

Lord Dufferin served as the Viceroy of India from 1884 to 1888. While he initially showed a neutral stance toward the formation of the Indian National Congress in 1885, his attitude shifted as the organization began to articulate political demands. In 1888, during a speech at the St. Andrews Day dinner in Calcutta, he famously ridiculed the Congress by describing it as representing only a microscopic minority of the Indian population. This statement was intended to downplay the significance of the nationalist movement and suggest that the Congress did not have the mandate or the support of the diverse masses of India.

Explanation

Dhing Express is the nickname given to Hima Das, an Indian sprinter from the state of Assam. She earned this moniker because she hails from the town of Dhing in the Nagaon district. Hima Das rose to international prominence in 2018 after becoming the first Indian athlete to win a gold medal in a track event at the IAAF World U-20 Championships, where she won the 400-meter race with a time of 51.46 seconds. Her rapid rise in the world of athletics and her connection to her hometown led to the widespread use of this nickname by the media and the public.

Explanation

In September 2018, Bharat Sanchar Nigam Limited (BSNL) signed a two-year contract with the legendary Indian boxer and five-time world champion M.C. Mary Kom, appointing her as its brand ambassador. The state-owned telecommunications company engaged the boxing icon to feature in its promotional campaigns and advertisements across various media platforms to enhance its brand visibility and reach. At the time of this appointment, Mary Kom was a highly celebrated athlete who had recently secured a gold medal at the 2018 Commonwealth Games, and her association with BSNL was intended to symbolize strength and reliability for the telecom firm.

Explanation

In the landmark case of Navtej Singh Johar v. Union of India (2018), a five-judge Constitution Bench of the Supreme Court of India unanimously ruled that Section 377 of the Indian Penal Code was unconstitutional insofar as it criminalized consensual sexual acts between adults in private. Section 377 was a colonial-era provision dating back to 1860 that prohibited carnal intercourse against the order of nature. The Court held that this section violated the fundamental rights to equality, liberty, and privacy guaranteed under Articles 14, 15, 19, and 21 of the Indian Constitution. This judgment overturned the 2013 Suresh Kumar Koushal ruling and effectively decriminalized homosexuality in India, recognizing the sexual orientation of individuals as a natural attribute of their privacy and dignity.

Explanation

The BrahMos missile system is a product of a joint venture established in 1998 between India's Defence Research and Development Organisation (DRDO) and Russia's NPO Mashinostroyeniya (NPOM). The name BrahMos is a portmanteau derived from the names of two major rivers: the Brahmaputra in India and the Moskva in Russia. This collaboration led to the formation of BrahMos Aerospace, which oversees the design, development, and production of the weapon system. It is classified as a supersonic cruise missile that utilizes a two-stage propulsion system, including a solid propellant booster and a liquid ramjet engine. The missile is known for its high speed, precision, and versatility, as it can be launched from land-based mobile launchers, ships, submarines, and fighter aircraft.

Explanation

Andrés Manuel López Obrador, commonly known as AMLO, won a landslide victory in the Mexican general elections held on July 1, 2018. Leading the Juntos Haremos Historia (Together We Will Make History) coalition, which was centered around the National Regeneration Movement (MORENA) party, he secured more than 53 percent of the popular vote. This victory was significant as it marked the first time in modern Mexican history that a leftist candidate won the presidency, breaking the decades-long dominance of the Institutional Revolutionary Party (PRI) and the National Action Party (PAN). He was elected to a six-year term and officially assumed office as the President of Mexico on December 1, 2018, succeeding Enrique Peña Nieto.

Explanation

Nawaz Sharif, the former Prime Minister of Pakistan, was sentenced to 10 years in prison by an accountability court in July 2018. This conviction was primarily related to the Avenfield properties case, which emerged following the 2016 Panama Papers leak. The leaked documents from the law firm Mossack Fonseca revealed that Sharif's children owned several offshore companies used to purchase expensive property in London. The Supreme Court of Pakistan subsequently ordered an investigation, leading to his disqualification from office in 2017 and his eventual sentencing for owning assets beyond his known legal sources of income.

Explanation

The National Register of Citizens (NRC) update is a process specific to the state of Assam, aimed at identifying genuine Indian citizens and detecting illegal immigrants who entered the state after midnight of March 24, 1971. On July 30, 2018, the Registrar General of India released the complete draft of the NRC for Assam. Out of the total 3.29 crore applicants who had applied for inclusion, the names of approximately 2.89 crore people were included in the draft, while 40,07,707 individuals were excluded. This massive administrative exercise was conducted under the direct monitoring of the Supreme Court of India to implement the provisions of the Assam Accord of 1985 and Section 6A of the Citizenship Act, 1955. The excluded individuals were given the opportunity to file claims and objections to prove their citizenship in subsequent rounds of verification.

Explanation

Dr. Harshvardhan, in his capacity as the Union Minister for Science and Technology, Earth Sciences, and Environment, Forest and Climate Change, inaugurated the most advanced System of Air Quality and Weather Forecasting and Research (SAFAR) at Chandni Chowk in Delhi on July 21, 2018. This system was developed indigenously by the Indian Institute of Tropical Meteorology (IITM), Pune, and is operationalized by the India Meteorological Department (IMD). The system was designed to provide location-specific information on air quality in near real-time and a 72-hour advance forecast. It tracks pollutants such as PM₂.₅, PM₁₀, Ozone, Nitrogen Oxides, Sulfur Dioxide, Carbon Monoxide, Benzene, Toluene, Xylene, and Mercury, while also providing weather parameters like temperature, rainfall, and humidity to help citizens take preventive measures.

Explanation

In July 2018, researchers published a study in the journal Science detailing the discovery of a stable body of liquid water on Mars. Using data from the Mars Advanced Radar for Subsurface and Ionosphere Sounding (MARSIS) instrument aboard the European Space Agency's Mars Express spacecraft, scientists identified a 20-kilometer-wide underground lake. This subglacial reservoir is located approximately 1.5 kilometers beneath the ice of the southern polar region, specifically at Planum Australe. The detection was made through radar profiles that showed a very sharp change in signals, characteristic of liquid water rather than ice or rock. This finding marked the first evidence of a persistent body of liquid water on the planet, suggesting that high concentrations of dissolved salts and the pressure of the overlying ice keep the water in a liquid state despite the freezing temperatures.

Explanation

The historic summit between United States President Donald Trump and North Korean Supreme Leader Kim Jong Un was held on June 12, 2018, at the Capella Hotel on Sentosa Island, Singapore. This event represented the first-ever meeting between a sitting U.S. president and a North Korean leader. During the summit, both leaders signed a joint statement that included commitments toward the denuclearization of the Korean Peninsula and the establishment of new diplomatic relations. Singapore served as the host country because of its proven track record of neutrality, high security standards, and its status as a diplomatic hub that maintains formal relations with both nations.

Explanation

The Allahabad Pillar Inscription, also known as the Prayag Prashasti and composed by Harisena, provides a detailed list of twelve kings of Dakshinapatha defeated by Samudragupta. Dhananjaya was the ruler of Kusthalpura as identified in the inscription. Nilaraja was the contemporary king governing the territory of Avamukta. Ugrasena is recorded as the ruler of Palaka who faced the Gupta forces. Vishnugopa was the Pallava king of Kanchi, one of the most prominent southern monarchs mentioned in the list. These rulers were part of Samudragupta's Grahana-Moksha-Anugraha policy, where they were captured, released, and reinstated as tributary kings.

Explanation

Alamgirpur and Hulas are the two sites among the given options located in Uttar Pradesh. Alamgirpur, situated in the Meerut district on the banks of the Hindon River, is recognized as the easternmost settlement of the Indus Valley Civilization. Hulas is located in the Saharanpur district and is a significant archaeological site representing the Late Harappan culture in the upper Doab region. Both sites provide evidence of the expansion and presence of Harappan influence within the geographical limits of present-day Uttar Pradesh.

Explanation

The Nanadesis were a prominent guild of medieval South Indian merchants who specialized in long-distance maritime and foreign trade. Derived from the Sanskrit words nana meaning many and desi meaning countries, their name signifies their extensive operations across diverse geographical territories beyond the Indian subcontinent. They were particularly influential during the Chola and Hoysala periods, establishing robust commercial networks that extended to Southeast Asia, including regions such as Sumatra, Java, and the Malay Peninsula. Inscriptional evidence, such as the 1088 CE Lobu Tua inscription found in Sumatra, confirms their presence in international ports where they traded in high-value commodities like spices, aromatic woods, and precious stones. As a powerful corporate body, they maintained their own sets of rules, cultural traditions, and even private mercenary forces to safeguard their merchant caravans and maritime interests across international borders.

Explanation

The medieval period in India was characterized by a significant cultural synthesis where Sanskrit treatises on music were translated into Persian to make Indian classical knowledge accessible to the Persian-speaking elite and scholars. For example, during the reign of Firoz Shah Tughlaq and later under the Mughals, works like the Ragdarpan were translated to bridge the gap between the two traditions. This academic and courtly endeavor aimed at documenting and preserving local artistic sciences. Simultaneously, the early Chishti Sufis were indeed known for their musical gatherings called sama, which they used as a means of achieving spiritual ecstasy and proximity to the divine. While both statements represent true historical facts of the medieval era, the mystical practice of sama within a specific religious order was not the primary driver or explanation for the broader intellectual and administrative movement of translating technical Sanskrit musical texts into Persian.

Explanation

The Ayodhya Inscription of Dhanadeva is a significant archaeological find that provides direct epigraphic evidence regarding the religious practices of the Shunga dynasty. In this inscription, Dhanadeva, who identifies himself as the sixth descendant of the Shunga emperor, mentions that his ancestor Pushyamitra Shunga performed two Ashvamedha sacrifices. This inscription, written in the Brahmi script, is one of the earliest examples of Sanskrit being used in a formal epigraphic record. It is vital for reconstructing the history of the 2nd century BCE as it highlights Pushyamitra Shunga's role in the resurgence of Vedic brahmanical traditions and his military achievements following the displacement of the Mauryan Empire.

Explanation

The term Chakla refers to a territorial administrative unit introduced during the Mughal period, most notably during the reign of Emperor Shah Jahan. It was established as a division consisting of a group of Parganas to streamline revenue collection and local administration. In the hierarchical structure of the Mughal Empire, the Chakla functioned as an intermediate level between the Subah, which was the largest provincial unit, and the Pargana, which was the smaller sub-district unit. Although it shared some similarities with the Sarkar in terms of scale and regional governance, it was a distinct administrative innovation designed to consolidate multiple Parganas under a single jurisdiction. This made it a territorial entity situated between the Subah and the Pargana levels without being synonymous with the traditional Sarkar unit.

Explanation

Chauth was a military tax or tribute collected by the Maratha Empire from territories that were not under their direct administrative control. The term is derived from the Sanskrit word Chaturthansa, meaning one-fourth, as it typically amounted to twenty-five percent of the land revenue or annual produce. By paying this levy, a ruler or local authority secured a guarantee of protection from the Marathas. Specifically, the payment ensured that the Maratha forces would refrain from raiding the territory themselves and would also defend the region against external aggression or third-party invasions. This system allowed the Marathas to expand their financial resources and political influence across the Indian subcontinent by providing security in exchange for revenue.

Explanation

Khair-ul-Manazil mosque was commissioned in 1561 CE by Maham Anaga, the influential foster mother of the Mughal Emperor Akbar and a powerful figure during his early reign. Located directly opposite the Purana Qila in Delhi, the structure was designed to serve as both a mosque and a madrasa. The name Khair-ul-Manazil translates to the most auspicious of houses. The construction was supervised by Shihab-ud-din Ahmad Khan, an important official and relative of Maham Anaga. The building is an example of early Mughal architecture, characterized by its high central arch, five-bay prayer hall, and the use of incised plaster work and stone inlay.

Explanation

Ramchandra Dev was the ruler of the Yadava dynasty of Devgiri, not Warangal. He is noted for his encounter with Alauddin Khalji's forces in 1296 and his subsequent submission to the Delhi Sultanate. The kingdom of Warangal was under the rule of the Kakatiya dynasty during this period, with Prataparudra Deva serving as the monarch who eventually surrendered to Malik Kafur in 1310. Because Ramchandra Dev's reign was centered in the Marathwada region of Devgiri, associating him with the Telugu kingdom of Warangal is historically inaccurate.

Explanation

Jahandar Shah reigned from 1712 to 1713 following the war of succession after Bahadur Shah I. Muhammad Shah, popularly known as Muhammad Shah Rangeela, ascended the throne in 1719 and had a long reign until 1748, witnessing the transition of the empire and the invasion of Nadir Shah. Ahmad Shah Bahadur succeeded Muhammad Shah in 1748 and occupied the throne until 1754. Alamgir II was then crowned in 1754 and ruled until 1759, a period characterized by the increasing dominance of the East India Company and internal factionalism.

Explanation

Gujarat possesses the longest coastline among all Indian states, stretching approximately 1214.7 kilometers. This extensive shoreline accounts for nearly 23 percent of the total mainland coastline of India. The exceptional length is primarily due to the presence of numerous indentations and two major inlets, the Gulf of Kutch and the Gulf of Khambhat. These geographical features create a winding and irregular perimeter along the Arabian Sea, significantly increasing the total linear distance of the state's maritime boundary compared to the more linear coastlines of other states.

Explanation

The Yamuna river has been characterized as a biological disaster due to the extreme levels of environmental pollution that have rendered its water incapable of supporting aquatic life. Massive discharge of untreated domestic sewage and industrial effluents, particularly from the National Capital Region and cities like Mathura and Agra, has caused the Dissolved Oxygen (DO) levels to drop to zero in several stretches. This absence of oxygen, coupled with extremely high Biochemical Oxygen Demand (BOD) and coliform bacteria counts, means that the river can no longer sustain a healthy ecosystem. Various environmental reports and observations by the National Green Tribunal have highlighted that these conditions have turned the river into a biologically dead water body, creating a persistent ecological crisis in Uttar Pradesh.

Explanation

The Sri Venkateswara Temple, one of the most visited pilgrimage sites in the world, is located on the Tirumala hills in Tirupati district, Andhra Pradesh. The Tirumala hills are part of the Seshachalam hill range of the Eastern Ghats, at an elevation of about 853 metres above sea level. The temple is managed by the Tirumala Tirupati Devasthanams (TTD) and is dedicated to Lord Venkateswara (Balaji). Shevaroy, Biligiriranga, and Javadhi are other hill ranges in peninsular India, but none is associated with this temple.

Explanation

The Thar Desert, also known as the Great Indian Desert, is a physiographic region dominated by wind-blown sand and alluvial deposits that belong to the Pleistocene epoch and the Holocene period. Geologically, while the basement rocks of Rajasthan are ancient, the desertification and the accumulation of the characteristic sand dunes and saline lake deposits occurred during the Quaternary period. This era was marked by significant climatic changes and the shifting of river courses which contributed to the accumulation of these relatively young sedimentary layers across the region. The thickness of these Pleistocene and recent deposits varies across the desert, masking the underlying older geological formations.

Explanation

The Tapti river, also known as the Tapi, originates in the Satpura Range of central India. Its source is specifically located near Multai in the Betul district of Madhya Pradesh. The river flows westward for about 724 kilometers through a rift valley, passing through the states of Madhya Pradesh, Maharashtra, and Gujarat before emptying into the Arabian Sea via the Gulf of Khambhat. While many major peninsular rivers originate in the Sahyadri or Western Ghats, the Tapti rises in the highlands of central India, situated to the north of the Western Ghats chain.

Explanation

The concept of the Global Village, popularized by Marshall McLuhan in the 1960s, describes how the world has become increasingly interconnected through the evolution of electronic media and telecommunications. This phenomenon is primarily driven by advancements in transport and communication development, which have effectively collapsed the barriers of time and space. Rapid improvements in information technology, the internet, and satellite communication allow for the instantaneous exchange of information across the globe, while modern aviation and logistics networks facilitate the swift movement of people and goods. These technological shifts create a shared global experience where events in one part of the world are felt immediately elsewhere, mimicking the close-knit social dynamics of a small village on a planetary scale.

Explanation

Denmark has long been recognized for its highly advanced dairy industry, which prioritizes productivity and efficiency through scientific management. The high milk yield per cow in Denmark is the result of decades of systematic breeding programs, focusing on high-yielding breeds such as the Danish Holstein and Danish Jersey. Additionally, the Danish dairy sector utilizes a highly controlled nutritional regimen and advanced automation in milking and monitoring animal health. Agricultural statistics from the period leading up to 2018 show that Danish cows achieved some of the highest average milk production figures in the world, significantly outpacing the global average and leading the productivity rankings among major dairy producers. This intensive approach ensures that each animal reaches its maximum biological potential for lactation.

Explanation

According to the 2011 Census data, Shrawasti district recorded the lowest female literacy rate in Uttar Pradesh, with only 34.78 percent of its female population being literate. Shrawasti also holds the position of having the lowest overall literacy rate in the state at 46.74 percent. The district, located in the Devipatan division near the Indo-Nepal border, consistently ranks at the bottom of educational indices for both genders, reflecting significant regional disparities in educational attainment within the state.

Explanation

Sultana, Gulabi, and Kali Champa are prominent commercial varieties of grapes grown across various agro-climatic regions in India. Sultana is a well-known seedless variety extensively used for both table consumption and the production of high-quality raisins. Gulabi, which is also known as Muscat Hamburg, is highly regarded for its distinct muscat aroma, sweet taste, and deep purple-colored skin, making it a favored table grape in the domestic market. Kali Champa is a traditional seeded variety characterized by its small, dark purple or black berries and is primarily cultivated in the peninsular regions of India for fresh consumption and juice making.

Explanation

Kerala is traditionally recognized as the Spice Garden of India due to its dominance in the production of high-value spices. The state's location along the Western Ghats provides the ideal tropical climate, high humidity, and heavy rainfall necessary for these crops. Kerala accounts for approximately 70 percent of India's total small cardamom production, with the Idukki district serving as the primary cultivation hub. It also holds a leading position in black pepper cultivation, benefiting from the region's well-drained loamy soil and consistent monsoon cycle. These favorable agro-climatic conditions ensure that Kerala remains the primary source for both cardamom and pepper in the country.

Explanation

Anai Mudi is the highest peak in the Western Ghats and the state of Kerala, standing at an elevation of 2,695 meters. Mount Saramati is the highest peak in Nagaland, located near the village of Thanamir on the India-Myanmar border with a height of 3,826 meters. Nanda Devi is the highest point in Uttarakhand and the highest mountain located entirely within India, reaching an altitude of 7,816 meters. Dodda Betta is the highest peak in the Nilgiri Mountains and the state of Tamil Nadu, situated at an elevation of 2,637 meters.

Explanation

Chile is the world's leading producer of iodine, accounting for approximately 60% to 65% of global production according to mineral data available up to 2018. The country's dominance in the market is driven by its massive caliche deposits located in the Atacama Desert of northern Chile. These deposits are unique because they allow for the commercial extraction of iodine as a co-product of nitrate mining. Through large-scale heap leaching and chemical precipitation processes, Chilean mining operations extract iodine from these nitrate-rich ores. Data from the United States Geological Survey (USGS) indicated that Chile's annual production consistently exceeded 18,000 metric tons during this period, maintaining a substantial lead in both total output and global reserves.

Explanation

According to the 2011 Census, Haryana recorded the lowest child sex ratio in the 0-6 age group among all Indian states. The state overall child sex ratio stood at 834 girls per 1000 boys. When bifurcated into sectors, the child sex ratio in rural Haryana was 835, while in urban Haryana, it was even lower at 829. These figures represented the bottom-most rankings for these categories across the major states in India during that census period, reflecting a significant gender imbalance in the early childhood demographic of the state.

Explanation

According to the 2011 Census of India, Uttar Pradesh recorded the highest rural population in the country in absolute terms. Out of its total population of approximately 19.98 crore, about 15.53 crore people resided in rural areas, which constitutes roughly 18.6 percent of the total rural population of India. This demographic dominance is a result of the state's massive overall population size and its predominantly agrarian-based settlement patterns. The state contains the largest number of villages and rural households, far exceeding the rural population counts of any other state in India during the 2011 enumeration.

Explanation

The evolution of life on Earth is categorized by distinct geological periods. Shelled animals, specifically small shelly fossils, first appeared during the Cambrian explosion approximately 541 million years ago. Insects evolved later during the Devonian period about 400 million years ago. The first reptiles emerged from tetrapod ancestors during the Carboniferous period approximately 312 million years ago. Mammals are the most recent of these groups to appear, evolving from synapsid ancestors during the Late Triassic period roughly 225 million years ago. This progression from the Paleozoic era to the Mesozoic era defines the chronological sequence of 3, 2, 1, 4.