Which of the following statements is/are false

Options

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

Answer

A,C,D

Explanation

`(IV) to 5` unpaired electrons.
`(I) to 4` unpaired electrons.
`(II) to 1` unpaired electron.
`(III) to` No unpaired electron.