Which district of Jharkhand has the largest mines of mica?

The correct answer is: D. Dhanbad

Dhanbad is a district in the Indian state of Jharkhand. It is the largest district in Jharkhand by area and the second most populous district in the state after Ranchi. The district is known for its coal mines, which are the largest in India. Dhanbad is also home to a number of mica mines.

Mica is a mineral that is used in a variety of products, including electrical insulation, cosmetics, and roofing materials. The mica mines in Dhanbad are some of the largest in the world. The mica industry in Dhanbad is an important source of employment for the local population.

The other options are incorrect because:

• Koderma is a district in the Indian state of Jharkhand. It is not known for its mica mines.
• Latehar is a district in the Indian state of Jharkhand. It is not known for its mica mines.
• Chatra is a district in the Indian state of Jharkhand. It is not known for its mica mines.