The correct answer is: c) Angul.
Angul is a district in the Indian state of Odisha. It is known as the “Aluminum City” of India because it is home to the largest aluminum smelter in the country. The smelter is operated by the National Aluminum Company Limited (NALCO), which is a government-owned company. NALCO was established in 1981 and is headquartered in Bhubaneswar, the capital of Odisha. The company produces alumina, aluminum metal, and power. It is one of the largest producers of aluminum in India and the world.
The other options are incorrect because they are not known as the “Aluminum City” of India. Koraput is a district in the Indian state of Odisha. It is known for its tribal culture and its natural beauty. Jharsuguda is a district in the Indian state of Odisha. It is known for its coal mines and its steel plants. Keonjhar is a district in the Indian state of Odisha. It is known for its iron ore mines and its steel plants.