Which of the following alcohols is used in cough syrups?

Ethanol is the alcohol used in cough syrups. Ethanol is used because many medicinal ingredients are insoluble in water but dissolve easily in alcohol, ensuring a stable liquid mixture. Beyond its role as a solvent, ethanol acts as a preservative, preventing the growth of microorganisms in the syrup. It is a two-carbon alcohol with the chemical formula C2H5OH, also known as ethyl alcohol.