Consider the following types of vehicles :

Correct Option

Alternative powertrain vehicles are defined as those that utilize propulsion systems other than the conventional internal combustion engine (ICE) burning petrol or diesel for primary propulsion.

• Full battery electric vehicles (BEVs): These vehicles are propelled exclusively by electric motors, which draw power from onboard rechargeable battery packs. They do not incorporate an ICE for propulsion.
• Hydrogen fuel cell vehicles (FCEVs): These vehicles generate electricity through an electrochemical reaction between hydrogen and oxygen within a fuel cell, which then powers electric motors. This process avoids the combustion of fossil fuels.
• Fuel cell-electric hybrid vehicles: These systems integrate a hydrogen fuel cell with an additional energy storage device, such as a battery or supercapacitor. This configuration allows for multiple electric power sources to drive the vehicle.

All three vehicle types listed represent a departure from conventional ICE technology, employing electric propulsion systems (either solely battery-driven, fuel cell-driven, or a combination thereof). Therefore, all three are considered alternative powertrain vehicles.

Incorrect Options

Options (1) Only one, (2) Only two, and (4) None are incorrect because each of the three vehicle types described utilizes a propulsion system fundamentally different from the conventional internal combustion engine. They all rely on electric motors powered by batteries, fuel cells, or a hybrid combination, thereby qualifying as alternative powertrain vehicles.