Correct option is D
Rajasthan is the leading state in India in terms of copper ore reserves. The Khetri Belt in the Jhunjhunu district of Rajasthan is one of the major sources of copper in India. Other significant copper-producing regions in Rajasthan include the Singhana belt and the Banswara and Dungarpur districts. While states like Jharkhand and Chhattisgarh also have notable copper reserves (especially in the Singhbhum district of Jharkhand), Rajasthan dominates in terms of quantity. The Hindustan Copper Limited (HCL) operates large-scale copper mines in the state. Copper is a key industrial metal, used in electrical wiring, plumbing, and the manufacturing of machinery and vehicles. The reserves in Rajasthan are essential for India's industrial growth, especially in the context of infrastructure development.
