Which of the following is a hill district of Assam?

The correct answer is option 2. Key Points Dima Hasao is a hill district of Assam. It is located in the southern part of Assam and is known for its picturesque hills, valleys, and diverse tribes. The district is rich in natural beauty, with forests, waterfalls, and tea gardens. Dima Hasao was previously known as North Cachar Hills and is home to several indigenous tribes like the Dimasa, Zeme Naga, and Karbi. The other districts listed (Cachar, Karimganj, and Golaghat) are primarily plains or riverine regions.