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The correct answer is option 4.

Key Points

• Jharkhand is known as the "Mineral Heartland" or "State of Minerals" of India due to its vast reserves of various minerals. Hence, option 4 is correct.
• Mineral Resources in Jharkhand:
• Jharkhand is exceptionally rich in mineral resources, including coal, iron ore, copper ore, uranium, mica, bauxite, and limestone.
• It holds a significant percentage of India’s total mineral reserves.
• The state is home to major industrial hubs and mining belts, such as the Chota Nagpur Plateau, which is a storehouse of minerals.
• Importance of Minerals in Jharkhand’s Economy:
• The mining and mineral-based industries are the backbone of the state's economy.
• Jharkhand is a major contributor to the national mineral production, playing a vital role in the country’s industrial development.

The correct answer is option 2.

Key Points

• The Grey Revolution refers to the increase in the production and use of fertilizers, especially chemical fertilizers, to boost agricultural productivity. It is a term that highlights the importance of fertilizers in enhancing crop yields. Hence, option 2 is correct.
• Role of Fertilizers in the Grey Revolution:
• The Grey Revolution was marked by the widespread use of chemical fertilizers, such as urea, superphosphate, and potassium nitrate.
• The introduction of these fertilizers played a crucial role in increasing soil fertility and improving crop production across various parts of the world, particularly in India, during the 1960s and 1970s.
• Impact on Indian Agriculture:
• The use of chemical fertilizers during the Grey Revolution significantly contributed to the increase in crop productivity, supporting the Green Revolution's goals of increasing food security and agricultural output.
• The increased use of fertilizers, combined with high-yielding varieties of crops, helped India overcome food shortages and achieve self-sufficiency in food production.

The correct answer is option 2.

Key Points

• The average elevation of the Kosi Plain above mean sea level is approximately 30 meters. This low-lying region is part of the larger Indo-Gangetic Plain and is characterized by its flat topography. Hence option 2 is the correct answer.
• The Kosi River, originating from the Himalayas, descends rapidly to this plain, contributing to its relatively low elevation. The river's dynamics and the plain's topography have significant implications for agriculture, settlement patterns, and flood management in the region.

The Correct answer is Option 3. 

Key Points

Let’s look at the differences between consecutive terms:

98−117 =−19

80−98 =−18

64−80 =−16

Notice that the differences themselves go: 

−19,−18,−16. The gaps between these differences are:

From  −19 to −18: an increase of  +1

From −18 to −16: an increase of  +2

Hence, it seems each new difference increases by 1 more than the previous increment (+1, then +2, then +3, and so forth).

So, the next difference should be  −16+3=−13. Therefore, the fifth term is: 64+(−13) =51

Hence Correct answer is Option 3.

The correct answer is option 2.

Key Points

• In 2023, Kozhikode in Kerala was declared as India's first UNESCO "City of Literature." Hence option 2 is the correct answer.
• This recognition is part of the UNESCO Creative Cities Network (UCCN), which aims to promote cooperation among cities that have identified creativity as a strategic factor for sustainable urban development.
• Kozhikode's rich literary heritage, vibrant cultural scene, and contributions to literature were key factors in achieving this honor. The city is home to more than 70 publishing houses, which bring out 400 to 500 books a year, and 545 libraries, which account for tens of thousands of members.

The correct answer is option 3.

Key Points

• Quinine is a natural alkaloid used as a drug to treat malaria, particularly caused by Plasmodium falciparum. It has been widely used since its discovery.
• Source of Quinine:
• Quinine is obtained from the Cinchona plant (Cinchona officinalis) which is native to South America but cultivated in tropical regions globally.
• Part of the Plant:
• Quinine is extracted specifically from the stem bark of the Cinchona tree. Hence, option 3 is correct.
• Why the Stem Bark?
• The bark contains the highest concentration of quinoline alkaloids, including quinine and other derivatives like quinidine.
• These alkaloids are synthesized and stored in the bark tissues of the plant.

Additional Information

• Malaria is a life-threatening disease caused by Plasmodium parasites, transmitted to humans through the bite of infected female Anopheles mosquitoes.
• Causing Agents:
• Plasmodium falciparum (most severe and fatal)
• Plasmodium vivax (widespread but less severe)
• Plasmodium ovale
• Plasmodium malariae
• Plasmodium knowlesi (rare).
• Symptoms:
• Fever, chills, sweating (cyclical pattern)
• Headache, nausea, vomiting
• Severe cases: Organ failure, cerebral malaria, or death.

Correct answer is Option 1.

Key Points

• The services sector in India has been the primary beneficiary of globalization since the economic reforms of 1991. hance answer 1 is correct
• This sector contributes over 50% to India’s GDP, making it the most significant driver of the Indian econom​Information Technology (IT) and ITeS:
• Globalization opened up opportunities for Indian IT companies to serve international clients.
• Companies like TCS, Infosys, and Wipro became global leaders in IT and outsourcing services.
• Business Process Outsourcing (BPO):
• India became a hub for BPO services due to its cost advantages and skilled, English-speaking workforce.
• Tourism and Hospitality:
• Increased global connectivity boosted tourism, with India becoming a preferred destination for medical and cultural tourism.
• E-Commerce Growth:
• Platforms like Amazon, Flipkart, and Zomato thrived due to globalization, transforming the retail and logistics ecosystem.
• Foreign Direct Investment (FDI):
• The liberalization of the services sector attracted significant foreign investments in telecom, finance, insurance, and other sub-sectors.

The Correct answer is the Option 4.

 Key Points

• Turmeric (Curcuma longa) is a tropical plant in the ginger family, native to South Asia, and is widely known for its culinary, medicinal, and dyeing properties.
• The plant is primarily cultivated for its underground rhizomes, which are rich in curcumin, a compound responsible for its characteristic yellow color and medicinal properties.
• Part of the Plant Used for Turmeric Powder:
• Turmeric powder is obtained from the dried rhizome of the turmeric plant.
• Rhizome refers to the underground stem of the plant, commonly referred to as the "root" in everyday usage, although it is botanically a stem.
• The rhizomes are harvested, boiled or steamed, dried, and then ground into a fine powder.
• Dried Root (Rhizome)
• The rhizome of turmeric is rich in essential oils and curcuminoids, which are concentrated during the drying and grinding process.
• The curcumin in the rhizome has multiple health benefits, including anti-inflammatory and antioxidant effects, making it a valuable part of the plant for both medicinal and culinary purposes.
• Dried foot 
• There is no part of the turmeric plant called the "dried foot." This is not a valid botanical term.
• Seed 
• Turmeric is propagated primarily through rhizomes (underground stems), not seeds. The seed does not produce the powder used in cooking or medicine.

The correct answer is  Option 2.

Key Points

Patna College was established in 1863. Hence, option 2 is correct.

• Location:
• Patna College is located in Patna, Bihar, India, and is one of the oldest and most prestigious institutions in the region.
• Establishment:
• It was established by the British colonial government as a result of the growing demand for higher education in the region.
• Affiliation:
• Initially affiliated with the University of Calcutta, it later became affiliated with the Patna University after its formation in 1917.
• Importance:
• Patna College has played a significant role in shaping the educational landscape of Bihar, providing higher education in fields such as science, arts, and commerce.
• The college has a rich legacy of producing notable alumni who have contributed to various fields, including politics, literature, and education.

The correct answer is option 3​

Key Points The correct methods of storing hydrogen are in the form of hydrides and by compressing hydrogen gas. Hence, option 3 is correct. 

• In the Form of Hydrides:
• Metal Hydrides:
• Hydrogen can be stored in metal hydrides, which are solid compounds where hydrogen is chemically bonded with metals like lithium, sodium, magnesium, or nickel.
• These hydrides absorb hydrogen gas and store it in a stable, solid form at low pressures and ambient temperatures.
• Advantages:
• Hydrogen storage in hydride form is more compact and safer because it avoids the high pressure or cryogenic conditions required by other methods.
• It allows for efficient storage and release of hydrogen, particularly in fuel cell applications.
• Disadvantages:
• Requires energy (heat) to release hydrogen, which may limit its efficiency depending on the source and application.
• By Compressing Hydrogen Gas:
• High-Pressure Storage:
• Hydrogen gas can be compressed to high pressures (typically 350–700 bar) and stored in cylinders or tanks.
• This is one of the most common methods for storing hydrogen for industrial use, including in hydrogen-powered vehicles.
• Advantages:
• This method is relatively straightforward and well-developed.
• Compressed hydrogen can be easily transported and utilized in various sectors like automotive and energy storage.
• Disadvantages:
• Storing hydrogen gas at high pressures requires specialized equipment (high-pressure tanks), which can be expensive.
• Energy-intensive compression is also a concern for the efficiency of this method.
• In the Form of Water :
• Hydrogen in Water:
• Hydrogen is a component of water (H₂O), but it is not stored in its elemental molecular form within water.
• While hydrogen can be extracted from water through a process called electrolysis, water itself is not used as a storage medium for elemental hydrogen.
• Electrolysis:
• Water can be split into hydrogen and oxygen using electricity, but this process is used to produce hydrogen, not to store it