D. Ethanol is the only one out of the listed alcohols that may be
consumed, that too in dilute concentrations. The other alcohols have
multiple other uses, such as proponal's use as a solvent and antiseptic,
meaning it is commonly found in hand sanitizing solutions. Methanol is
highly polar and is used as fuel, solvent and in antifreeze solutions.
Butanol is used in paints, hydraulics and in perfumes.