In the given options, pairs of wildlife reserves or natural features and their respective locations are provided.
Option 1: Dampa Tiger Reserve : Mizoram. This is correctly matched as Dampa Tiger Reserve indeed exists in the state of Mizoram.
Option 2: Gumti Wildlife Sanctuary : Sikkim. This is incorrectly matched. Gumti Wildlife Sanctuary is actually situated in the northeastern state of Tripura, not Sikkim.
Option 3: Saramati Peak : Nagaland. This is correctly matched because Saramati Peak is indeed the highest peak in the state of Nagaland.
Therefore, it can be concluded that 1 and 3 are correctly matched pairs. Hence, the correct answer is option 3, which represents `1 and 3 only`.