What are biosphere reserves?

Examples of In-situ conservation method are national parks, sanctuaries, biosphere reserves, and hotspots. The number of (A) national parks, (B) wildlife sanctuaries and (C) biosphere reserves of India, are

Under MAB programme of UNESCO India has identified "_______" (no) areas to be declared biosphere reserves

Nanda Devi biosphere reserve is found in

Which of the following statement for biosphere reserve is incorrect?