Oil and Natural Gas Corporation (ONGC) is an energy holding company that specializes in the exploration, development, and production of oil and gas. It operates through two segments: Exploration and Production and Refining and Marketing. The company is engaged in refining and processing of crude oil and natural gas, oilfield services, transportation of oil and natural gas, and production of value-added products such as liquefied petroleum gas, naphtha, superior kerosene oil, aviation turbine fuel, ethane, propane, butane, high-speed diesel, motor spirit, and petrochemicals.