The correct answer is (d), Bailadila mine.
Bailadila mine is a large open-pit iron ore mine located in the Bailadila hills of Chhattisgarh, India. It is the largest mechanized mine in India and one of the largest iron ore mines in the world. The mine is operated by NMDC Limited, a state-owned mining company.
The Bailadila mine has a reserve of 2.5 billion tonnes of iron ore. The mine produces about 20 million tonnes of iron ore per year. The ore is used to produce iron and steel in India and other countries.
The Bailadila mine has a significant impact on the economy of Chhattisgarh. The mine employs about 10,000 people directly and indirectly. The mine also generates revenue for the state government.
The Bailadila mine has been criticized for its environmental impact. The mine has been accused of deforestation, water pollution, and air pollution. The mine has also been accused of displacing indigenous people from their land.
Despite its environmental impact, the Bailadila mine is an important economic asset for India. The mine provides jobs and revenue for the country. The mine also helps to meet the demand for iron ore in India and other countries.