Which of the following is a common gaseous fuel found in motor vehicles?

Propane is a common gaseous fuel used in motor vehicles, particularly in vehicles designed for alternative fuel use, such as those operating on liquefied petroleum gas. Propane offers several advantages as an automotive fuel, including its lower emissions compared to traditional fuels and its ability to be stored and transported in a liquefied state, which makes it convenient for use in various automotive applications.

Kerosene is primarily used as a fuel for jet engines and heating, not commonly found in typical motor vehicles. Gasoline, while a prevalent fuel for cars, is a liquid at ambient conditions and not classified as a gaseous fuel. Ethanol, though it can be blended with gasoline to create fuels like E85, is also a liquid and is primarily derived from plant materials. Therefore, propane stands out as the appropriate choice in the context of gaseous fuels utilized in motor vehicles.