The correct answer is: Karbi Anglong.
Karbi Anglong is the largest district in Assam by area, with a total area of 36,290 square kilometers. It is located in the north-eastern part of the state, and is bordered by Nagaland to the north, Meghalaya to the south, and the districts of Golaghat, Jorhat, and Sonitpur to the west. The district is home to a number of different ethnic groups, including the Karbis, Dimasa, Kuki, and Mikir. The main language spoken in the district is Karbi.
Karbi Anglong is a mountainous district, with the average elevation being around 1,000 meters above sea level. The highest peak in the district is Mount Saramati, which is located at an elevation of 1,720 meters. The district is also home to a number of rivers, including the Brahmaputra, the Dihing, and the Dhansiri.
The climate of Karbi Anglong is tropical, with hot and humid summers and cool and dry winters. The average temperature in the district ranges from 15 degrees Celsius in winter to 35 degrees Celsius in summer. The annual rainfall in the district is around 2,000 millimeters.
The economy of Karbi Anglong is based on agriculture, forestry, and mining. The main crops grown in the district are rice, maize, and tea. The district is also home to a number of forests, which are a source of timber and other forest products. The district is also home to a number of mines, which produce coal, limestone, and other minerals.
Karbi Anglong is a beautiful and diverse district, with a rich history and culture. The district is home to a number of different ethnic groups, each with its own unique culture and traditions. The district is also home to a number of natural attractions, including mountains, rivers, and forests.