Which complex shown minimum of three types of isomerism?

Options

A. `[Co(en)_(2)(NO_(2))(SCN)]Cl`
B. `[Co(en)_(3)]Cl_(3)`
C. `[Co(NO_(2))_(3)(NH_(3))_(3)]`
D. `[CoCl(NH_(3))_(5)]^(2+)`

Answer

A

Explanation

`1rarr` Linkage, Ioniation, Geometrical, Optical
`2rarr` optical
`3rarr` Linkage, Geomerical
`4rarr` No isomerism