The correct answer is: a) Kokrajhar, Chirang, Baksa, Udalguri.
The Bodoland Territorial Council (BTC) is a semi-autonomous district council in the Indian state of Assam. It was created in 2003 under the Bodoland Territorial Areas District (BTAD) Accord, which was signed between the Government of India and the Bodo Liberation Tigers (BLT). The BTC comprises of four districts: Kokrajhar, Chirang, Baksa, and Udalguri. The headquarters of the BTC is located in Kokrajhar.
The BTC has a population of over 3 million people. The majority of the population is Bodo, followed by Assamese, Bengali, and Hindi. The official language of the BTC is Bodo.
The BTC has its own legislative assembly, executive council, and judiciary. The BTC is responsible for the development of the Bodo areas in Assam. It has its own budget and taxes.
The BTC has been successful in promoting peace and development in the Bodo areas. It has also been successful in protecting the rights of the Bodo people.
The other options are incorrect because they do not comprise of the four districts that make up the Bodoland Territorial Council.