Which of the following octahedral complexes d | vedclass

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(D) Geometrical isomerism in octahedral complexes occurs when the ligands can be arranged in different spatial positions relative to each other (cis a

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$[M A_5 B]$

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(D) Geometrical isomerism in octahedral complexes occurs when the ligands can be arranged in different spatial positions relative to each other (cis and trans).For a complex of the type $[M A_5 B]$,all positions are equivalent relative to the ligand $B$.Any ligand $A$ is always in a cis position to $B$,and there is no possibility of a trans arrangement for $B$ with respect to any $A$.Therefore,$[M A_5 B]$ does not exhibit geometrical isomerism.In contrast,$[M A_4 B_2]$ and $[M A_2 B_4]$ show cis and trans isomers,and $[M A_3 B_3]$ shows facial $(fac)$ and meridional $(mer)$ isomers.

Which of the following octahedral complexes does not exhibit geometrical isomerism? ($A$ and $B$ are monodentate ligands)

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