Which complex has a coordination number of 6 and exhibits geometrical isomerism?

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[Co(NH₃)6]3+ [Fe(CN)6]4− [Ni(H₂O)6]2+ [Co(NH₃)4Cl₂]+ Correct

[Co(NH₃)4Cl₂]+ (octahedral, 6 ligands) shows cis and trans isomers.

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