Isomers in coordination chemistry include many types. In structural isomers hydrate or solvent isomers, ionisation isomers and coordination isomers have same overall formula but have different ligands attached to the central atom or ion.
The term linkage isomerism or ambidentate isomerism are used for cases of bonding through different through different atoms of the same ligand.
Stereoisomers have the same ligands, but differ in the geometric arrangement of the ligands.
`Ma_(3).b_(3)` complex has two geometrical forms(I) Facial (II) Meridonial then which of the following statement is incorrect ?

Options

A. In facial isomers, three same ligands occupy adjacent positions on octahedron face.
B. In meridional isomers, same ligands are present at `90^(@) and 180^(@)` angles.
C. In facial isomers, same ligands are present only at `90^(@)` angle.
D. Both isomers (facial and merridional) are optically active.

Answer

D