Which of the following statements are true ?

Options

A. In `[PtCl_(2)(NH_(3))_(2)]^(2+)` the cis form is optically inactive while trans form is optically active
B. In `[Fe(C_(2)O_(4))_(3)]^(3-)`, geometrical isomerism does not exist while optical isomerism exists
C. In Mabcd, square planar complexes show both optical as well as geometrical isomerism
D. In Mabcd tetrahedral complex, optical isomerism can not be observed

Answer

B