Which of the following is an alcohol?
Propane
Butane
Methane
Ethanol
Correct Answer: D — Ethanol
Explanation:
Ethanol (C2H5OHC_2H_5OHC2H5OH) is an alcohol, characterized by the hydroxyl group (-OH) attached to a carbon atom. It is widely used in beverages, disinfectants, and as a biofuel.