| Peak | Mountains |
|---|---|
| 1. Namcha Barwa | Garhwal Himalaya |
| 2. Nanda Devi | Kumaon Himalaya |
| 3. Nokrek | Sikkim Himalaya |
Nanda Devi (7,816 m) is located in the Kumaon Himalayas of Uttarakhand. It holds the distinction of being the highest peak situated entirely within India. Thus, Pair 2 is correctly matched.
Pair 1: Namcha Barwa (7,782 m) is situated in the Eastern Himalayas, specifically the Assam Himalaya, near the Great Bend of the Brahmaputra River in Arunachal Pradesh. The Garhwal Himalaya lies in Uttarakhand. Hence, this pair is incorrectly matched.
Pair 3: Nokrek Peak is the highest point in the Garo Hills, which form part of the Meghalaya Plateau in Meghalaya. It is not associated with the Sikkim Himalaya or any Himalayan range. Hence, this pair is incorrectly matched.
Options (A), (C), and (D) are incorrect as they include one or both of the wrongly matched pairs (1 and 3).