The correct answer is (a) Iron-Ore.
Kodarma is a town in the Indian state of Jharkhand. It is famous for its iron ore reserves. The town is located in the Kodarma district, which is one of the major iron ore producing districts in India. The iron ore reserves in Kodarma are estimated to be around 1.5 billion tonnes. The ore is of high quality and is used in the manufacture of steel.
Mica is a mineral that is used in a variety of applications, including electrical insulation, electronics, and cosmetics. It is found in many parts of the world, including India. However, Kodarma is not a major producer of mica.
Gypsum is a mineral that is used in a variety of applications, including construction, agriculture, and medicine. It is found in many parts of the world, including India. However, Kodarma is not a major producer of gypsum.
Bauxite is a mineral that is used in the manufacture of aluminum. It is found in many parts of the world, including India. However, Kodarma is not a major producer of bauxite.