How many of the following complexes are outer orbital complexesA) CoH2O6+3B) CoF6-3C) CoNH36+3D) CoCN6-3

This is a special case;All octahedral complexes of Co+3 are diamagnetic with d2sp3 hybridization except CoF6-3which is the only homoleptic octahedral complex of cobalt (III) with sp3d2 hybridization with a spin only magnetic moment of 4.9 B.M;It is the only outer orbital octahedral complex formed by cobalt (III).Co+3...3d6