The highest electrical conductivity of the following aqueous solutions is of:

Electrical conductivity in these solutions depends on the concentration of ions, which is determined by the strength of the acid.Difluoroacetic acid (${\text{CHF}}_2\text{COOH}$) has two strongly electron-withdrawing fluorine atoms.These atoms increase the acidity (lower $\text{p}{K}_a$) through the $-I$ effect, leading to a higher degree of dissociation.More dissociation means more ions, resulting in the highest electrical conductivity.