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

I. Maikal Hills and the plateau region of Bilaspur-Katni are major bauxite producing areas. 

II. The Koderma Gaya-Hazaribagh belt of Jharkhand is important for maganese. 

III. The Durg Bastar-Chandrapur belt is known for its iron ores.