Coordination Compounds

Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).

Assertion (A): The total number of geometrical isomers shown by \([\mathrm{Co}(\mathrm{en})_2 \mathrm{Cl}_2]^{+}\) complex ion is three.

Reason (R): \([\mathrm{Co}(\mathrm{en})_2 \mathrm{Cl}_2]^{+}\) complex ion has an octahedral geometry.

In the light of the above statements, choose the most appropriate answer from the options given below :