Among the following statements, identify the correct ones for complexes of lanthanide (iu) ion: 37) a) metal-ligand bond is significantly ionic. (b) complexes r

Among the following statements, identify the correct ones for complexes of lanthanide (IU) ion: 37) a) Metal-ligand bond is significantly ionic. (b) Complexes rarely show isomerism. (c) The coordination number is not more than 8 (d) The magnetic moments are not accounted even approximately by spin only value for majority of lanthanides.