Arrange in order of decreasing trend towards ES (electrophilic substitution) reactions: Chlorobenzene (I), Benzene (II), Anilinium chloride (III), Toluene (IV)

Question

$ (a)\;II > I > III > IV \\ (b)\;III > I > II > IV \\ (c)\;IV > II > I > III \\ (d)\;I > II > III > IV $