The correct answer is: Power plants and coal mines.
Korba is a city in Chhattisgarh, India. It is the headquarters of Korba district. The city is known for its coal mines and power plants. It is one of the largest coal producing districts in India. The city is also home to a number of industrial units, including steel plants, cement plants, and fertilizer plants.
Textile mills are not a major industry in Korba. There are a few textile mills in the city, but they are not as significant as the coal mines and power plants.
IT parks are also not a major industry in Korba. There are a few IT companies in the city, but they are not as significant as the coal mines and power plants.
Historical monuments are also not a major attraction in Korba. There are a few historical monuments in the city, but they are not as significant as the coal mines and power plants.