The first Environmental Law in India was enacted in

The correct answer is: C. 1972

The first Environmental Law in India was the Water (Prevention and Control of Pollution) Act, 1974. It was enacted in response to the growing concern about the pollution of water resources in India. The Act established the Central Pollution Control Board and the State Pollution Control Boards to regulate water pollution. It also made it a punishable offense to pollute water resources.

The other options are incorrect because:

• Option A is the year when India gained independence from British rule.
• Option B is the year when the Indian Constitution was adopted.
• Option D is the year when the Environment (Protection) Act was enacted.