Which of the following is the exhaust pipe emission from Fuel Cell Electric Vehicles, powered by hydrogen? Water vapour

Which of the following is the exhaust pipe emission from Fuel Cell Electric Vehicles, powered by hydrogen?

(a) Hydrogen peroxide
(b) Hydronium
(c) Oxygen
(d) Water vapour

Correct Answer: (d) Water vapour

Explanation:
Fuel Cell Electric Vehicles (FCEVs) powered by hydrogen emit only water vapor as a by-product, making them environmentally friendly.
Possible Sources: Automotive engineering and environmental science references.