For octahedral Mn(II) and tetrahedral Ni(II) complexes, consider the following statements:I) both the complexes can be high spin. II) Ni(II) complex can very rarely below spin. III) with strong field ligands, Mn(II) complexes can below spin. IV) aqueous solution of Mn(II) ions is yellow in colour.The correct statements are:

Mn2+ with d5configuration form paramagnetic in the presence of both weak and strong field. If can form both high spin and low spin complexes. Similarly Ni2+ with  d8configuration can form both low spin and high spin complexes. Except with very strong ligands such as CN−Co,Ni2+always form tetrahedral complexes with high spin. Aqueous solutions of MnII  almost colourless.