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 \(\left[\mathrm{Co}(\mathrm{en})_2 \mathrm{Cl}_2\right]^{+}\)complex ion is three. Reason (R): \(\quad\left[\mathrm{Co}(\mathrm{en})_2 \mathrm{Cl}_2\right]^{+}\)complex ion has an octahedral geometry. In the light of the above statements, choose the most appropriate answer from the options given below :

• A

  Both (A) and (R) are correct but (R) is not the correct explanation of (A)
• Correct answer
  B

  (A) is not correct but (R) is correct
• C

  Both (A) and (R) are correct and (R) is the correct explanation of (A)
• D

  (A) is correct but (R) is not correct

Solution

$\left[\mathrm{Co}(\mathrm{en})_2 \mathrm{Cl}_2\right]^{+}$has octahedral geometry with two geometrical isomers.

Hence, the correct answer is option: 'B'.