Answer: a

Explanation:

Recently, the US has revealed that it will supply 31 armed drones (MQ-9B) to India at an estimated cost of around $4 billion. This will increase India's maritime security and regional awareness capability and it will also get full ownership of these aircraft. The MQ-9B drone, also known as the Predator drone, is an unmanned aerial vehicle (UAV) with two variants: SkyGuardian and SeaGuardian. Hence, statement 1 is correct.

Its payload capacity is 3,850-pound (1,746 kg). It has nine hardpoints that can carry sensors, laser guided bombs and air-to-ground missiles. The Indian Navy has been operating the SeaGuardian variant of the MQ-9B since 2020. SeaGuardian can operate at altitudes above 40,000 feet and can carry a take-off weight of up to 5,670 kg with a fuel capacity of 2,721 kg. Hence, statement 2 is incorrect.

Answer: a

Explanation:

Recently, the Central Government has created a framework to promote voluntary carbon markets in the agriculture sector. Carbon markets are financial systems where carbon credits are bought and sold. These markets set a monetary price for carbon emissions. Hence, statement 1 is incorrect.

There are two main types of carbon markets: compliance markets regulated by government policies and voluntary markets where entities voluntarily offset their emissions. Organizations such as the United Nations Development Program (UNDP) actively promote carbon market mechanisms to address climate change and facilitate international cooperation. Hence, statement 2 is correct.

Article 6 of the Paris Agreement allows countries to use international carbon markets to meet their NDCs (Nationally Determined Contributions). The first international carbon market was created in 1997 with the United Nations' Kyoto Protocol on climate change. Hence, statement 3 is incorrect.

Answer: b

Explanation:

Gravity is the weakest of the four fundamental forces of nature. The four known forces of nature are:

Gravity: It is the force that attracts two bodies with mass towards each other. It is the weakest force and acts over long distances. It is responsible for the motion of planets, stars, galaxies, and the entire universe.

Electromagnetic force: It is the force that acts between charged particles. It can be attractive or repulsive and is responsible for the behavior of atoms, molecules, and materials.

Weak nuclear force: It is responsible for the radioactive decay of atomic nuclei and is the force that governs interactions involving subatomic particles.

Strong nuclear force: It is the strongest of the four fundamental forces and holds the nucleus of an atom together. It is responsible for the binding of protons and neutrons inside the nucleus.

Answer: a

Explanation:

Ultraviolet radiation can effectively kill or inactivate bacteria, viruses and other microorganisms that can be harmful to human health. UV radiation damages the DNA of these microorganisms which prevents them from reproducing and renders them harmless.

UV radiation does not have any effect on the odor of the water. Odor can be caused by a variety of substances including dissolved gases and organic compounds, which are not affected by UV radiation.

 UV radiation does not affect the sedimentation of solid particles in water, nor does it remove turbidity. These processes are typically achieved through filtration or sedimentation.

Hence, option (a) is the correct answer.

Answer: c

Explanation:

The small intestine is the primary site of nutrient absorption in the digestive system, where nutrients from food are absorbed into the bloodstream. The liver produces bile, which is stored in the gallbl. Hence, statements 1 and 2 both are correct.