Which of the following statement(s) is/are incorrect?

Options

A. In `[CrBrCl(en)_(2)]^(+)` geometrical isomerism exists, while optical isomerism does not exist
B. Potassium aquadicyanosuperoxoperoxoperoxoch-romate(III) is IUPAC name `K_(2)[Br(N)_(2)O_(2)(O_(2))(H_(2)O)]`
C. There are 3 geometriacl and 15 stereoisomers possible for `[Pt(NO_(2))(NH_(3))(NH_(2)OH)(py)]^(+)` and `[PtBrCl(NO_(2))(NH_(3))(py)]` respectively
D. cis and trans forms are not diastereomers to each other

Answer

A, B, C, D

Explanation

cis-`[CoBrCl(en)_(2)]^(+)` will exhibit optical isomerism. No. of geometricl isomers of `[Pt(NO_(2))(NH_(3))(NH_(2)OH)py]^(3+)` and space isomers for `[PtBrCl](NO_(2))(NH_(3))(py)` are 30 cis and trans forms are diastereomers to each other.