Which of the following is an alternative fuel type?

• A. Gasoline
• B. Coal
• C. Ethanol
• D. Kerosene

Answer: (C)

Fuels used in vehicles can be traditional gasoline or other options called alternative fuels. Ethanol qualifies as an alternative because it’s an alcohol-based fuel produced from renewable plant materials (like corn or sugarcane) and can be used in engines designed for flexible-fuel operation or blended with gasoline (such as E10 or E85). This lets vehicles run with reduced reliance on crude oil and, depending on production, can lower lifecycle greenhouse gas emissions. In contrast, gasoline and kerosene are conventional hydrocarbon fuels derived from petroleum, and coal is a solid fuel used mainly for power generation, not typical direct vehicle propulsion. So ethanol stands out as the alternative fuel type.