Telangana has significant reserves of:

The correct answer is: A) Coal

Telangana is one of the largest producers of coal in India. The state has estimated reserves of over 6 billion tonnes of coal, which is about 10% of India’s total coal reserves. The coal in Telangana is of high quality and is used to generate electricity, produce steel, and make cement.

The other options are incorrect because:

• Limestone is a type of rock that is used to make cement, lime, and other building materials. Telangana does have significant reserves of limestone, but it is not as important as coal to the state’s economy.
• Iron ore is a mineral that is used to make steel. Telangana does have some iron ore reserves, but they are not as large as the coal reserves.
• Granite is a type of igneous rock that is used to make building materials, countertops, and other products. Telangana does have some granite reserves, but they are not as important as the coal reserves.