Which of the following statement(s) is/are correct in the context of the mineral resources of India?

I. Jharkhand is the leading producer of mica, while Andhra Pradesh is known for its bauxite reserves.
II. The Bokaro-Jamshedpur-Dhanbad belt is the largest coal-producing region in India.
III. The Zawar mines in Rajasthan are famous for their lead and zinc production.