Which complex is likely to show optical activity :

Options

A. Trans-`[Co(NH_(3))_(4)Cl_(2)]^(+)`
B. `[Cr(H_(2)O)_(6)]^(3+)`
C. `Cis-[Co(NH_(3))_(2)(en)_(2)]^(3+)`
D. Trans-`[Co(NH_(3))_(2)(en)_(2)]^(3+)`

Answer

c

Explanation

`[M(aa)_(2)b_(2)]` Type. Cis isomer occurs in two enantiomeric forms.