Consider the following statements about coal as a resource of energy in our country:

1. India has the fifth-largest coal reserves in the world.

2. Almost 15% of India’s coal production is from underground mines.

3. The Coal Mines (Nationalisation) Act 1973 does not allow private companies to mine coal for sale to third parties, though captive mining is allowed for specified end use sectors.

Which of the following is/are true?