Concept:Petroleum refining separates crude oil into useful products.
Explanation:Crude petroleum is a mixture of hydrocarbons with different boiling points.
Fractional distillation is used in refineries to separate these components.
The crude oil is heated and the vapours rise up a fractionating column.
Shorter hydrocarbons have lower boiling points and collect near the top.
Longer hydrocarbons have higher boiling points and collect near the bottom.
Each fraction is a useful product, such as petrol, kerosene, diesel and lubricating oil.
This makes fractional distillation the correct process.
Answer:B. fractional distillation