NTPC Limited is an India-based company, which is engaged in the generation and sale of electricity. The principal business activity of the Company is electric power generation by a coal-based thermal power plant. The Company's business segments include Generation and Others. The Company's Other business includes providing consultancy, project management and supervision, re-gasification, oil and gas exploration and coal mining. The Company's subsidiaries include NTPC Electric Supply Company Ltd., NTPC Vidyut Vyapar Nigam Ltd., Kanti Bijlee Utpadan Nigam Ltd., Nabinagar Power Generating Company Ltd., Bhartiya Rail Bijlee Company Ltd., Patratu Vidyut Utpadan Nigam Ltd., North Eastern Electric Power Corporation Ltd., THDC India Limited, NTPC Mining Ltd., NTPC EDMC Waste Solutions Private Ltd., NTPC Renewable Energy Ltd. and Ratnagiri Gas and Power Private Ltd.