Correct option is A
· In September, 1975, CIL was formed as a Holding Company with five subsidiaries, namely, Bharat Coking Coal Limited (BCCL), Central Coalfields Limited (CCL), Eastern Coalfields Limited (ECL), Western Coalfields resulting in day to day administrative, technical and communication problems etc.
· Coal India Limited (CIL) came into existence in November 1975.
· CIL is the largest coal producer in the world and one of the largest corporate employers in India.
· CIL is a Maharatna company.
· It plays a key role in enabling citizens to get power at a just price by supplying 80% of its entire coal to coal-based power plants.