Correct Option
Statement 2 is correct. The National Tiger Conservation Authority (NTCA) is a statutory body. It was constituted under the Wildlife (Protection) Act, 1972, following an amendment in 2006, with the mandate to strengthen tiger conservation and oversee Project Tiger.
Statement 3 is correct. The National Ganga River Basin Authority (NGRBA), which was formed in 2009 under the Environment (Protection) Act, 1986, was indeed chaired by the Prime Minister of India. Its objective was to plan and implement measures for the conservation and pollution abatement of the Ganga River.
Incorrect Options
Statement 1 is incorrect. The Animal Welfare Board of India (AWBI) was established in 1962 under Section 4 of the Prevention of Cruelty to Animals Act, 1960, and not under the Environment (Protection) Act, 1986. It functions under the Ministry of Fisheries, Animal Husbandry, and Dairying.
Option (1) is incorrect because it includes only statement 1, which is false.
Option (3) is incorrect because it omits statement 3, which is true.
Option (4) is incorrect because it includes statement 1, which is false.