MCQ
Indicate the complex entity which shows optical isomerism.
- ATrans- $\left[ PtCl _2( en )_2\right]^{2+}$
- B$\left[ Co \left( NH _3\right)_4 Cl _2\right]^4$
- ✓$Cis -\left[ CrCl _2( OX )_2\right]^{3-}$
- D$\left[ Co \left( NH _3\right)_3\left( NO _3\right)_3\right]$


