Among the following mixtures, dipole-dipole as major interaction is present in

We know that

Dipole-Dipole force exists between polar molecules.

So, here

In $\mathrm{KCl}$ (Ionic compound) and water (polar compound) ion-dipole interaction exists.

In Benzene and carbon tetrachloride dispersion (London) forces interaction exists. as they both are hydrocarbons, and all hydrocarbons are non–polar.

Similarly, In Benzene and ethanol dispersion forces exist.

But Acetonitrile and acetone both are polar so here dipole-dipole interaction exists.

therefore, option(d) is correct.