The correct answer is: a) Dzukou Valley.
Dzukou Valley is a high-altitude valley located in the Naga Hills of Nagaland, India. It is a popular ecotourism destination, known for its scenic beauty and trekking trails. The valley is home to a variety of plant and animal life, including the endangered Dzukou Lily.
Kohima is the capital of Nagaland and the second most populous city in the state. It is a major tourist destination, known for its historical sites and cultural attractions.
Mokokchung is a town in Nagaland and the third most populous city in the state. It is a major commercial center and is known for its traditional handicrafts.
Dimapur is the largest city in Nagaland and the commercial capital of the state. It is a major transportation hub and is home to a number of industries.