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.

List-$I$ (Complex ion)	List-$II$ (Calculated spin only magnetic moment $(BM)$)
$A$. $[Cr(H_2O)_6]^{2+}$	$I$. $3.87$
$B$. $[Co(H_2O)_6]^{2+}$	$II$. $5.92$
$C$. $[Cu(H_2O)_6]^{2+}$	$III$. $4.90$
$D$. $[Mn(H_2O)_6]^{2+}$	$IV$. $1.73$

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?$(en = \text{ethylenediamine})$