Question: Which of the following complex ions will exhibit optical isomerism?
$(\mathrm{en}=1,2$-diamine ethane)
$\left[\mathrm{Co}(\mathrm{en})_{2} \mathrm{Cl}_{2}\right]^{+}$
$\left[\mathrm{Zn}(\mathrm{en})_{2}\right]^{2+}$
$\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{4} \mathrm{Cl}_{2}\right]^{+}$
$\left[\mathrm{Cr}\left(\mathrm{NH}_{3}\right)_{2} \mathrm{Cl}_{2}\right]^{+}$
Correct Option: 1
Solution:
Solution not required
