Consider the following about oil refineries in the country: Country's first oil refinery at Digboi, Assam was the only oil refinery in the country till the mid of the twentieth-century. At present, there are around 22 oil refineries out which maximum are in public sector. Which of the following is incorrect?

Mistake Points Here, the question asks about the incorrect statement. Both the statements are correct. So the correct answer to the question becomes option 4. About Oil Refineries In India: Petroleum refining is the process in which oil is extracted from its crude form to various products. Products like kerosene, diesel, petrol, lubricants, etc. are formed as a by-product of petroleum refining. India's first oil refinery was set up in Digboi, Assam. It was set up in the year 1901. It was the only oil refinery till 1974. It was in 1974 that Mumbai High was discovered. It joined Digboi as the second oil refinery in the country after independence. Since the discovery of the Mumbai off-shore petroleum reserves , the production of petroleum has seen a quantum jump. However, increasing population and serving the domestic demand has made India a net importer of crude oil. India, is, however, a net exporter of refined products . At present, there are 22 refineries - 17 are under the public sector, 3 under the private sector and 2 in the joint venture .