The correct option is (a).
Explanation
The Chhotanagpur Plateau is often referred to as the "Ruhr of India" or the mineral heartland of the country. It covers parts of Jharkhand, Odisha, West Bengal, and Chhattisgarh. The region is geologically rich in Precambrian rocks, hosting significant deposits of metallic and non-metallic minerals.
Statement-wise Analysis:
- 1. Iron (Correct): The Chhotanagpur region possesses some of the richest iron ore belts in India. The Singhbhum district in Jharkhand and the adjoining districts in Odisha (Keonjhar, Mayurbhanj) contain massive reserves of high-grade hematite iron ore.
- 2. Coal (Correct): This plateau is the storehouse of Indian coal. The Gondwana coal fields located in the Damodar Valley (including Jharia, Bokaro, and Raniganj) account for a vast majority of India's prime coking coal reserves.
- 3. Manganese (Correct): Manganese ore is frequently associated with the iron ore deposits in this region. Significant reserves are found in the Singhbhum district of Jharkhand and the Keonjhar and Sundargarh districts of Odisha, which fall within the plateau's geological influence.
- 4. Gold (Incorrect): While the name of the river "Subarnarekha" (flowing through the plateau) translates to "streak of gold" and alluvial gold has been historically reported in river sands, the Chhotanagpur plateau does not possess huge reserves of gold. The primary gold reserves in India are located in the Dharwar craton of Karnataka (Kolar and Hutti Gold Fields).
Key Takeaway:
The Chhotanagpur Plateau is primarily characterized by its immense reserves of Coal, Iron Ore, Manganese, Mica, and Bauxite. It is not a major region for gold production compared to the Karnataka plateau.