Arrange the following compounds in order of increasing dipole moment:- Toluene (I) ; m-dichorobenzene (II) ;o-dichlorobenzene (III) ; p- dichlorobenzene.(IV)

Question

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