In India, Bihar is the largest producer of

lead
manganese
mica
limestone

The correct answer is: C. mica

Bihar is the largest producer of mica in India. It accounts for about 60% of the country’s mica production. Mica is a mineral that is used in a variety of products, including electrical insulation, cosmetics, and roofing.

Lead is a metal that is used in a variety of products, including batteries, ammunition, and solder. Manganese is a metal that is used in a variety of products, including steel, batteries, and fertilizer. Limestone is a rock that is used in a variety of products, including cement, construction, and agriculture.