Hasdeo Valley in Chhattisgarh is famous for –

The correct answer is: B. Coal mines

Hasdeo Arand is a forested plateau in the Indian state of Chhattisgarh. It is home to a number of coal mines, including the Hasdeo Arand Coalfield, which is one of the largest coalfields in India. The coal mines in Hasdeo Arand are important for the Indian economy, as they provide a significant source of coal for the country’s power plants. However, the coal mines have also been the subject of controversy, as they have been blamed for environmental damage and displacement of local communities.

The other options are incorrect because:

• Iron ore is not found in Hasdeo Arand.
• Bauxite is a type of aluminum ore, which is not found in Hasdeo Arand.
• Dolomite is a type of limestone, which is not found in Hasdeo Arand.