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(C) . Optical activity is exhibited by complexes that possess optical isomers. Optical isomers are non-superimposable mirror images of each other.Comp

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$cis-[Co(en)_2Cl_2]^{+}$

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(C) . Optical activity is exhibited by complexes that possess optical isomers. Optical isomers are non-superimposable mirror images of each other.Complexes of the type $[M(AA)_2B_2]$ exhibit optical isomerism only in their $cis$-form,as the $trans$-form possesses a plane of symmetry.ComplexType$[CoCl_6]^{3-}$$[MA_6]$$[Co(en)Cl_4]^{-}$$[M(AA)B_4]$$cis-[Co(en)_2Cl_2]^{+}$$cis-[M(AA)_2B_2]$$trans-[Co(en)_2Cl_2]^{+}$$trans-[M(AA)_2B_2]$Therefore,$cis-[Co(en)_2Cl_2]^{+}$ exhibits optical activity.

Among the following complexes,the one that can exhibit optical activity is

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