The correct answer is: a) Eastern Assam.
The Dehing Patkai Festival is a three-day annual festival that celebrates the natural beauty and cultural diversity of Eastern Assam. The festival is held in the Dehing Patkai National Park, which is located in the Tinsukia district of Assam. The festival features a variety of events, including cultural performances, traditional food stalls, and nature walks. The festival is a great opportunity to learn about the culture and history of Eastern Assam, and to experience the natural beauty of the region.
Option b) The hill districts is incorrect because the Dehing Patkai National Park is not located in the hill districts of Assam. The hill districts are located in the southern part of Assam, while the Dehing Patkai National Park is located in the eastern part of the state.
Option c) Barak Valley is incorrect because the Dehing Patkai National Park is not located in the Barak Valley. The Barak Valley is located in the southern part of Assam, while the Dehing Patkai National Park is located in the eastern part of the state.
Option d) Central Assam is incorrect because the Dehing Patkai National Park is not located in central Assam. The Dehing Patkai National Park is located in the eastern part of the state.