Correct Answer: (e) None of the above
Solution:All refineries mentioned in the question are under public sector. At present, out of total 23 refineries in India, 19 are in Public Sector, 3 are in Private Sector and one is as a Joint Venture of Public-Private Sector. Petroleum (crude oil) is transformed and refined into useful products such as gasoline (petrol), diesel fuel, asphalt base, fuel oils, heating oil, kerosene, liquefied petroleum gas, and petroleum naphtha at an oil refinery or petroleum refinery. Chinese civilizations were among the first to refine oil. Oil refineries are typically large, sprawling industrial complexes with extensive piping running through them, transporting fluid streams between large chemical processing units like distillation columns. Oil refineries are similar to chemical plants in that they use a lot of the same technology.
Oil is discovered beneath the earth's surface, and the location is sometimes also underwater. Though extracting oil from beneath the ocean's surface is much more difficult than drilling wells on land, it is still profitable, which is why oil exploration is carried out on either floating or fixed platforms on the ocean's bed. Offshore drilling is the process of extracting oil from beneath the seabed, whereas onshore drilling is the process of extracting oil from beneath the earth's surface away from the ocean. Onshore and offshore drilling is not only used for oil extraction; it is also used for natural gas extraction at times.