Correct Answer: (a) Similipal
Solution:Initially, UNESCO's World Biosphere reserve list only included India's Nilgiri, Sundarban, Bay of Mannar and Nanda Devi Biosphere reserves. In May, 2009 UNESCO announced to include 22 new biosphere reserves of 17 countries. In the new list India's Similipal, Pachmadi and Nokrek biosphere reserves were also included. After that in July, 2012, UNESCO also included India's Achanakmar- Amarkantak biosphere reserve. In 2013, Great Nicobar biosphere reserve also became a part of this list. By February, 2021, UNESCO's list included 714 biosphere reserves of 129 countries belongs to World Network of Biosphere Reserves.