Despite having huge coal reserve in OUT country, why do we import millions of tons of coal?

Despite having huge coal reserve in OUT country, why do we import millions of tons of coal?

1. It is policy of Govt. of India to save its own coal reserve for future use and import now from other countries for present use.
2. Most of the thermal plants in our country are coal based and they are unable to gel sufficient coal supply from our coal mines.
3. Steel plants require large quantities of coking coal which we do not have, coking coal is to be imported from other countries.

(a) 1, 2 and 3
(b) 2 and 3 only
(c) 1 and 2 only
(d) 1 and 3 only

Answer (b)