Select CORRECT statement about complex species `[Co(en)(NH_(3))_(2)]Cl_(2)]Cl`:

Options

A. It has four stereoisomers out of which two are optically active
B. It is inner-orbital complex
C. It exhibit ionisation isomerism
D. It exist in three geometrical isomeric forms

Answer

A, B, D

Explanation

`[CO(en)(NH_(3))_(2)Cl_(2)]Cl implies d^(2)sp^(3)` hybridised Co