The correct answer is (b), Rajasthan.
Rajasthan is the largest producer of mica in India, accounting for over 80% of the country’s production. The state has a long history of mica mining, and the industry employs over 100,000 people. Mica is a mineral that is used in a variety of products, including electrical insulation, cosmetics, and roofing materials.
Andhra Pradesh is the second largest producer of mica in India, followed by Bihar and Jharkhand. The mica industry in these states is not as developed as in Rajasthan, but it is still an important source of employment.
Mica is a valuable mineral, and its production is important to the Indian economy. However, the mica industry is also associated with a number of environmental and social problems. Mining can damage the environment, and workers in the mica industry are often exposed to hazardous conditions.
The Indian government is working to address these problems, and it has set up a number of initiatives to improve the sustainability of the mica industry. However, more needs to be done to ensure that the mica industry is both environmentally and socially responsible.