The correct answer is: a) Nawada, Gaya, and Jamui.
Bihar is a state in eastern India. It is the third-largest state in India by population, after Uttar Pradesh and Maharashtra. The state is known for its rich mineral resources, including mica. Mica is a mineral that is used in a variety of industries, including the electrical, electronics, and automotive industries.
The districts of Nawada, Gaya, and Jamui are located in the south-central part of Bihar. These districts are home to some of the largest deposits of mica in India. The mica mines in these districts are operated by both private and public companies.
The mica mining industry in Bihar is a major source of employment for the local population. The industry also contributes significantly to the state’s economy. However, the mica mining industry has been criticized for its environmental impact. The mining activities have led to deforestation, soil erosion, and water pollution.
The government of Bihar has taken steps to address the environmental impact of the mica mining industry. The government has implemented a number of regulations to control the mining activities. The government has also set up a number of environmental monitoring stations to monitor the impact of the mining activities.
Despite the environmental challenges, the mica mining industry in Bihar is an important part of the state’s economy. The government of Bihar is committed to developing the mica mining industry in a sustainable manner.
The other options are incorrect because they do not list the districts of Nawada, Gaya, and Jamui.