NTPC 

NTPC Limited primarily engages in the generation and sale of bulk power to state power utilities in India. It operates through two segments: Generation of Energy and Others. The company generates power from coal, gas, liquid fuel, hydro, solar, nuclear, wind, thermal, and renewable energy sources. It offers consultancy, project management, and supervision services. In addition, the company is involved in the energy trading, oil and gas exploration, and coal mining activities. Further, the company sells electricity to private DISCOMs operating in various states. NTPC Limited was incorporated in 1975 and is based in New Delhi, India.