Option (C) Uttarakhand is the correct answer. According to the textbook table on Biosphere Reserves, the Nanda Devi Biosphere Reserve (with a total geographical area of 5860.69 km² and designated on 18.01.1988) is located in the Chamoli, Pithoragarh and Almora Districts in Uttarakhand. The other options (Bihar, Uttar Pradesh, and Odisha) are incorrect as they do not contain the Nanda Devi Biosphere Reserve. Odisha, for instance, hosts the Similipal Biosphere Reserve, not Nanda Devi.