Which one of the following is an example of a clean fuel ?

Options

A. Coke
B. propane
C. Petrol
D. Wax

Answer

B

Explanation

Clean fuel, is a natural fuel, like compressed natural gas or liquified petroleum gas, or a blend like gasohol. It produces less pollution than the alternatives and it is used as a substitute for fossil fuels. Examples of clean fuels include most types of ethanol, biodiesel, natural gas, biogas,electricity, propane and hydrogen.