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?

1. Pair 1: Nokrek Bio-sphere Reserve is located in the West Garo Hills district of Meghalaya. The Garo Hills are part of the Meghalaya plateau, and the reserve is indeed situated within this hill range. This pair is correctly matched. 2. Pair 2: Loktak Lake is the largest freshwater lake in Northeast India, located in Manipur. The Barail Range stretches across Nagaland and Assam, extending into parts of Manipur, but it is not the primary geographical feature associated with Loktak Lake, which lies in the central Manipur valley. This pair is incorrectly matched. 3. Pair 3: Namdapha National Park is located in Arunachal Pradesh. The Dafla Hills are located in the western part of Arunachal Pradesh. Namdapha National Park is situated further east, in the Changlang district, bordered by the Mishmi Hills and the Patkai Range. This pair is incorrectly matched. 4. Therefore, only the first pair is correctly matched.