Refining of petroleum involves
Correct option is B. Fractional distillation
Petroleum refining or Oil refining is an industrial process in which crude oil is extracted from the ground and transformed and refined into useful products like Liquefied Petroleum Gas (LPG), kerosene, asphalt base, jet fuel, gasoline, heating oil, fuel oils etc. Crude Oil consists of hydrocarbon molecules.
Petroleum can be refined by fractional distillation since it separates crude petroleum into useful fractions such as gasoline, kerosene oil, lubricating oil, etc.
Hence , option B is correct .