Consider the following pairs : 1. Nokrek Bio-sphere Reserve: Garo Hills 2. Logtak (Loktak) Lake : Barail Range 3. Namdapha National Park: Dafla Hills Which of the above pairs is/are correctly matched?

The question tests knowledge of geographical locations of important Biosphere Reserves and National Parks in India. Let's analyze each pair:

1. Nokrek Bio-sphere Reserve: Garo Hills - Correct. Nokrek Biosphere Reserve is located in the Garo Hills of Meghalaya. It is known for its rich biodiversity and the wild citrus (Citrus indica) gene pool.

2. Loktak Lake: Barail Range - Incorrect. Loktak Lake lies in the Central Manipur valley, surrounded by hills of the Manipur Hills (with the Loktak depression flanked by ranges like the Khoirentak and Thangjing hills). The Barail Range runs through southern Assam, Nagaland and Manipur, but the lake itself is not situated in/near the Barail Range.

3. Namdapha National Park: Dafla Hills - Incorrect. Namdapha National Park is located in the Patkai/Mishmi Hills of Changlang district in eastern Arunachal Pradesh, not in the Dafla (Nyishi) Hills, which lie in western Arunachal Pradesh.

Therefore, only pair 1 is correctly matched.

Why other options are incorrect:

B) 2 and 3 only - Incorrect as both pairs 2 and 3 are wrongly matched.

C) 1, 2 and 3 - Incorrect as pairs 2 and 3 are wrongly matched.

D) None - Incorrect as pair 1 is correctly matched.