Which one of the following has an optical iso | vedclass

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(B) Optical isomerism is shown by complexes that lack a plane of symmetry and a center of symmetry.$1$. $[Zn(en)(NH_3)_2]^{+2}$ is a tetrahedral compl

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$[Co(en)_3]^{+3}$

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(B) Optical isomerism is shown by complexes that lack a plane of symmetry and a center of symmetry.$1$. $[Zn(en)(NH_3)_2]^{+2}$ is a tetrahedral complex of the type $[M(AA)a_2]$,which is optically inactive due to the presence of a plane of symmetry.$2$. $[Co(en)_3]^{+3}$ is an octahedral complex of the type $[M(AA)_3]$. It does not possess any plane of symmetry or center of symmetry,making it chiral and optically active.$3$. $[Co(H_2O)_4(en)]^{+3}$ is of the type $[M(AA)a_4]$,which has a plane of symmetry and is optically inactive.$4$. $[Zn(en)_2]^{+2}$ is a tetrahedral complex of the type $[M(AA)_2]$,which is optically inactive due to the presence of a plane of symmetry.Therefore,$[Co(en)_3]^{+3}$ exhibits optical isomerism.

Which one of the following has an optical isomer?
$(en = \text{ethylenediamine})$

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Which one of the following has an optical isomer?$(en = \text{ethylenediamine})$