Total number of geometrical isomers possible for the complexes $\left[\mathrm{NiCl}_4\right]^{2-}$, $\left[\mathrm{CoCl}_2\left(\mathrm{NH}_3\right)_4\right]^{+},\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_3\left(\mathrm{NO}_2\right)_3\right]$ and $\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_5 \mathrm{Cl}\right]^{2+}$ is

• A

  2
• B

  3
• Correct answer
  C

  4
• D

  5

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