Option A — Only I, II and III are correct.
The Wildlife (Protection) Act, 1972 provided for protecting habitats (I), published an all-India list of protected species (II), and banned hunting of endangered species (III). Forests and wildlife were added to the Concurrent List, not the Union List (IV is incorrect).
The passage clearly states the Act's provisions: protecting habitats, publishing a protected species list, and banning hunting. Statement IV is a common trap — the 42nd Constitutional Amendment (1976) moved forests and wildlife to the Concurrent List, not the Union List. Examiners expect you to know this distinction. Always eliminate factually wrong statements in MCQs first.