Which of the following is considered beverage alcohol?

Beverage alcohol is defined as the substance that is safe for human consumption and is the active ingredient found in alcoholic beverages. Ethyl alcohol, also known as ethanol, is the type of alcohol that is commonly used in drinks like beer, wine, and spirits. It is the only form of alcohol suitable for consumption in these contexts, providing the intoxicating effects associated with drinking.

The other types of alcohol listed—methyl, isopropyl, and butyl—are not suitable for ingestion and can be toxic. Methyl alcohol (methanol) is highly poisonous and can cause serious health effects, including blindness and death. Isopropyl alcohol (isopropanol) is commonly used as a disinfectant and solvent, and while it is safe for external use, it is not safe to consume. Butyl alcohol has various industrial applications and is also not safe for consumption. Thus, ethyl alcohol stands out as the correct answer being the only type of alcohol found in beverages intended for human consumption.