The correct answer is: b) Karbi Anglong.
Karbi Anglong is a district in the Indian state of Assam. It is one of the three hill districts of Assam, along with Dima Hasao and North Cachar Hills. The Karbi people are the indigenous people of Karbi Anglong. They are a tribal people who speak the Karbi language. The Karbi people are predominantly found in Karbi Anglong, but they also live in other parts of Assam, as well as in the neighboring states of Meghalaya and Nagaland.
Dima Hasao is another hill district of Assam. It is home to the Dimasa people, who are also a tribal people. The Dimasa people speak the Dimasa language. The Dimasa people are predominantly found in Dima Hasao, but they also live in other parts of Assam, as well as in the neighboring state of Nagaland.
North Cachar Hills is the third hill district of Assam. It is home to the Kuki people, who are also a tribal people. The Kuki people speak the Kuki language. The Kuki people are predominantly found in North Cachar Hills, but they also live in other parts of Assam, as well as in the neighboring states of Manipur and Mizoram.
Kokrajhar is a district in the Indian state of Assam. It is not a hill district. The Bodo people are the indigenous people of Kokrajhar. They are a tribal people who speak the Bodo language. The Bodo people are predominantly found in Kokrajhar, but they also live in other parts of Assam, as well as in the neighboring state of Meghalaya.