- 1973: Coal Mines Nationalization Act- Coal India and other CPSEs took over private coal mining companies. They will dig coal, sell it to thermal power plants & other industries. (Indira Gandhi was PM at that time.) So, #1 is right. Answer could be A or D. - 2015: Coal Mines Special Provision Act: It opens up commercial coal mining for both private and public entities, and thus ends the monopoly of Coal India. Presently, coal blocks are allotted on the basis of auction. #2 is wrong. Thus Answer A: 1 only.