A basic salt is a salt that contains a metal cation and the conjugate base of a weak acid. The conjugate base of the weak acid behaves as a base and hence the salt shows basic properties. Among the given options, Zn(OH)CI is the only compound that can be a basic salt. It contains the metal ion zinc (Zn) and the anion of a weak acid, hydroxide (OH-). The hydroxide ion can act as a base and accept a proton from water molecules, increasing the concentration of hydroxide ions in solution and making the solution basic. Therefore, the correct answer is Zn(OH)CI.