The correct answer is: B) Iron Ore
Madhya Pradesh is the leading producer of iron ore in India. The state has the largest reserves of iron ore in the country, accounting for about 25% of the total reserves. The main iron ore producing districts in Madhya Pradesh are Jhabua, Shahdol, Sidhi, and Singrauli.
Limestone is the second most important mineral produced in Madhya Pradesh. The state has the second largest reserves of limestone in the country, accounting for about 15% of the total reserves. The main limestone producing districts in Madhya Pradesh are Raisen, Sagar, and Damoh.
Coal is the third most important mineral produced in Madhya Pradesh. The state has the third largest reserves of coal in the country, accounting for about 10% of the total reserves. The main coal producing districts in Madhya Pradesh are Singrauli, Satna, and Rewa.
Copper is not a major mineral produced in Madhya Pradesh. The state has very small reserves of copper, accounting for less than 1% of the total reserves in the country.