The total number of geometrical isomers possible for an octahedral complex of the type $[MA_{2}B_{2}C_{2}]$ is ($M=$ transition metal; $A, B$ and $C$ are monodentate ligands).

The number of enantiomeric pairs possible for the complex having general formula $[M(AB)_3]$ with coordination number $6$ is

Given below are two statements:
Statement $I$: Both $[Co(NH_3)_6]^{3+}$ and $[CoF_6]^{3-}$ complexes are octahedral but differ in their magnetic behaviour.
Statement $II$: $[Co(NH_3)_6]^{3+}$ is diamagnetic whereas $[CoF_6]^{3-}$ is paramagnetic.
In the light of the above statements,choose the correct answer from the options given below:

Calculate the total number of stereoisomers for the octahedral complex $[Fe(F)(Cl)(Br)(I)(NH_3)(H_2O)]^-$.

Which one of the following coordination complexes exhibits the lowest value of magnetic moment (in $BM$)?

The complex showing a spin-only magnetic moment of $2.82 \ B.M.$ is