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Among the choices, the best answer is alcohol. However, the most common groups of organic compounds in fuels are the alkanes and alkenes. Alcohol can also be used in fuel, especially bioethanol. Bioethanol is a common additive in fuels for motor vehicles, and is made from corn or sugar.

Organic compounds are substances that have carbon linked covalently to the hydrogen atom. Alcohol is the most used organic compound in the fuel. Thus, option A is correct.

What are alcohols?

Alcohols are compounds that consist of a hydroxyl group (-OH) attached as the functional group to the main carbon-hydrogen chain. They are represented as (ROH) where R is the alkyl group.

Fuels are made of the alkanes and the alkenes but alcohol-containing, bioethanol is also used as fuel in the motors and is made of sugar and corn.

Therefore, option A. alcohol is used as fuel.

Learn more about organic compounds here:

https://brainly.com/question/19376539

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