Correct option is B
The Dharwar System is the oldest system of rocks in India and is of Pre-Cambrian age. It is known for being rich in metallic minerals, particularly ferrous (iron-based) and non-ferrous minerals like gold, manganese, copper, and chromite. The rock formations in this system are predominantly found in the Dharwar region of Karnataka, parts of Madhya Pradesh, Jharkhand, Odisha, and Rajasthan. Most of India's important mineral deposits, particularly iron ore and manganese, are found in the Dharwar system. Thus, the correct answer is (b) Dharwar system.
Vindhyan system: Mainly consists of sedimentary rocks and is significant for building materials such as sandstone and limestone but is not known for metallic minerals.
Gondwana system: Known for coal deposits but not as rich in ferrous and non-ferrous minerals.
Tertiary system: Associated more with the formation of oil and gas, rather than ferrous and non-ferrous minerals.
