The correct statement among I to III are:
(I) Valence bond theory cannot explain the colour exhibit by transition metal complexes.
(II) Valence bond theory can predict quantitatively the magnetic properties of transition metal complexes.
(III) Valence bond theory cannot distinguish ligands as weak and strong field ones.1
(II) and (III) only
2
(I), (II) and (III)
3
(I) and (III) only
4
(I) and (II) only