Which among the following is the largest mechanized mine in India?

The correct answer is D) Bailadila mine. Bailadila in Dantewada district of Chhattisgarh is a group of high-grade iron ore deposits operated by NMDC. It is widely cited in standard GK as the largest mechanised iron ore mine in India, and its ore has long supplied steel plants across the country.

• A) Ratnagiri mine: The name is associated with a zinc-lead mine in Rajasthan, which is not a large mechanised mine of the kind the question asks about.
• B) Jaipur mine: Jaipur is a city and district. It has no mine of this scale that would fit the question.
• C) Sundergarh mine: Sundergarh is a district in Odisha with many iron ore and chromite mines. None of them is singled out as the largest mechanised mine in India.

The core concept is mineral geography: where India's iron ore and the scale of mechanised extraction are concentrated. For Mains, link this to the Mineral Resources section of GS-3 and to the MMDR Act, 1957 as amended in 2015, which dealt with auctions and the District Mineral Foundation.

Trap: Aspirants often pick Kiriburu (West Singhbhum, Jharkhand) because it is also described as a large mechanised iron ore mine. Check the exact wording of the question and the year-specific source before you choose.