Correct option is B
The correct answer is: (b) Article 253 of the Constitution.
Detailed Explanation
The Air (Prevention and Control of Pollution) Act, 1981 was enacted by the Parliament of India under Article 253 of the Constitution (read with Entry 13 of the Union List).
Article 253 empowers Parliament to make laws for the whole or any part of the territory of India for implementing any treaty, agreement, or convention, or any decision made at an international conference-specifically to implement the decisions taken at the United Nations Conference on the Human Environment held at Stockholm in June 1972.