Concept behind fuel cell vehicles (FCVs) is:

Correct option is C

Fuel cell vehicles (FCVs) run on electricity generated by a chemical reaction between hydrogen and oxygen in a fuel cell. This technology is environmentally friendly, as the only byproduct of the reaction is water vapor. Unlike battery-electric vehicles, which store energy, FCVs generate electricity on the go using hydrogen as fuel.
Information Booster: 1. Fuel cells: Devices that convert chemical energy directly into electricity through electrochemical reactions.
2. Hydrogen fuel cells: Use hydrogen as fuel, producing water and electricity without harmful emissions.
3. Zero-emission vehicles: FCVs do not emit pollutants, making them environmentally friendly.