Which district in Arunachal Pradesh is known for its coal reserves?

The correct answer is: a) Changlang

Changlang district is one of the 20 districts of Arunachal Pradesh, India. It is located in the eastern part of the state, bordering Assam to the south and Nagaland to the east. The district has a population of about 400,000 people and its headquarters is at Changlang town.

Changlang district is known for its coal reserves. The coal deposits in the district are estimated to be about 1 billion tonnes. The coal is of good quality and is used in power plants and other industries.

The other options are incorrect because:

• East Siang district is not known for its coal reserves.
• Tawang district is known for its scenic beauty and religious importance.
• West Kameng district is known for its tea gardens and biodiversity.