The correct answer is Korba.
Korba district is located in the state of Chhattisgarh, India. It is one of the most mineral-rich districts in the country, with deposits of coal, iron ore, bauxite, limestone, and dolomite. The district is also home to a number of power plants and steel mills.
Janjgir-Champa district is also located in the state of Chhattisgarh. It is a major producer of rice, wheat, and pulses. The district is also home to a number of forests and wildlife sanctuaries.
Dantewada district is located in the state of Chhattisgarh. It is one of the most backward districts in the country, with a high incidence of poverty and illiteracy. The district is also home to a number of Naxalite-affected areas.
Balod district is located in the state of Chhattisgarh. It is a major producer of rice, wheat, and pulses. The district is also home to a number of forests and wildlife sanctuaries.
In conclusion, Korba district is the most mineral-rich district in Chhattisgarh. It is home to a number of power plants and steel mills.