The correct answer is option 2 - Ministry of Environment and Forests. The National River Conservation Directorate (NRCD) is a government body that is responsible for the conservation and management of rivers in India. It works towards the prevention, control, and abatement of pollution in rivers across the country.
Option 1 - Ministry of Agriculture: This ministry is not responsible for the conservation of rivers. Its main focus is on agricultural policies, food production, and rural development.
Option 3 - Ministry of Earth Sciences: This ministry is primarily concerned with the scientific study of the earth, its atmosphere, oceans, and climate. It does not have a direct role in river conservation.
Option 4 - Ministry of Water Resources: While this ministry is involved in managing India`s water resources, including rivers, it is not directly responsible for the conservation of rivers. Its focus is more on water allocation, irrigation, and hydroelectric projects.
Therefore, the correct answer is option 2 - Ministry of Environment and Forests, as the National River Conservation Directorate operates under this ministry and is responsible for the conservation and management of rivers in India.