The correct answer is (b), Tripura. The Patkai Hills are a mountain range that runs along the border between India and Myanmar. They are part of the Indo-Burma ranges, which are a series of mountain ranges that run along the eastern edge of the Indian subcontinent. The Patkai Hills are home to a number of different ethnic groups, including the Naga, Kuki, and Chin peoples. The hills are also a popular destination for trekking and mountaineering.
Nagaland, Manipur, and Mizoram are all states in India that lie along the Patkai Hills. Tripura, on the other hand, is a state in India that does not lie along the Patkai Hills. Tripura is located in the northeastern part of India, and it is bordered by Bangladesh to the north, east, and west, and by Mizoram to the south. The capital of Tripura is Agartala.
The Patkai Hills are a significant geographical feature in the region. They form a natural barrier between India and Myanmar, and they have played an important role in the history of the region. The hills are also a source of water for many rivers in the region, and they are home to a number of different plant and animal species.