Answer:
Hydrogen and oxygen is the correct answer.
Explanation:
hydrogen fuel cells combine with Hydrogen and oxygen to produce electricity.
Hydrogen fuel operates when hydrogen is passed through the anode and oxygen is pass through the cathode.
Hydrogen fuel has tremendous efficiency and it does not produce any pollution that's the reason hydrogen fuel is considered as a clean fuel.
byproduct produced from the reaction is water molecules which is so pure that it can be used for the drinking and other purposes.
The chemical reaction which occurs between the hydrogen and oxygen produce electricity and water which is used for a different purpose.
