Assam has the largest reservoirs of _______ in India.

The correct answer is Mineral oil . Key Points Mineral oil Mineral oil is a distillate of petroleum. It is also a liquid by-product of refining crude oil to make gasoline and petroleum products. It is colourless, odourless, and a mixture of alkanes from a mineral source. Some other names of the oil are White oil Paraffin oil Liquid paraffin Liquid petroleum Important Points Assam The state is a major producer of crude oil and natural gas. Asia's first and world's second oil refinery, Digboi , is located in Assam. The state has four oil refineries such as: Digboi Guwahati Bongaigaon Numaligarh​ Additional Information Iron ore They are rocks and minerals from which metallic iron is extracted. It is rich in iron oxides and varies in its colour. It is usually found in the form of magnetite, hematite, goethite, limonite and siderite. Iron ore is used to make pig iron and steel. Coal It is one of the allotropes of carbon. Substances which have the same chemical properties but different physical properties are called allotropes. It is a combustible black sedimentary rock formed as coal seams. Coal is formed from the decayed dead plant matter and changes into peat. Due to heat and pressure for millions of years, the peat is converted into coal.