Which of the following has an optical isomer?

Options

A. `[Co(NH_3)_3Cl]^(+)`
B. `[Co(en)(NH_3)_2]^(2+)`
C. `[Co(H_2O)_4(en)]^(3+)`
D. `[Co(en)_2(NH_3)_2]^(3+)`

Answer

D

Explanation

Properties of ionic solid