Which of the following compounds does not sho | vedclass

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(C) Optical activity in coordination compounds requires the absence of a plane of symmetry or a center of inversion.$Cis-[CrCl_2(ox)_2]^{3-}$ has no p

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$Cis-[Fe(NH_3)_2(CN)_4]^{-}$

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(C) Optical activity in coordination compounds requires the absence of a plane of symmetry or a center of inversion.$Cis-[CrCl_2(ox)_2]^{3-}$ has no plane of symmetry and is optically active.$Cis-[CoBr_2(en)_2]^{+}$ has no plane of symmetry and is optically active.$Cis-[Fe(NH_3)_2(CN)_4]^{-}$ possesses a plane of symmetry (the plane containing the $Fe$,$2NH_3$,and $2CN$ ligands),making it achiral and optically inactive.$Cis-[PtCl_2(en)_2]^{2+}$ is optically active due to the lack of a plane of symmetry.Therefore,the correct option is $C$.

Which of the following compounds does not show optical activity?

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