Which of the following does not have optical isomer?

Options

A. (a) `[Co(en)_3]^(3+)`
B. (b) `[Co(en)_2Cl_2]^(+)`
C. (c) `[Co(NH_3)_3Cl_3]^(0)`
D. (d) `[Co(en)Cl_2(NH_3)_2]^(+)`

Answer

C

Explanation

Optical isomerism is shown by the type `[M(A A)X_2Y_2], [M(A A)_3], [M(A A)_2X_2]`