Effective atomic number of the complex [Co(NH₃)₆]Cl₃ is

Given data : It is given to identify  the effective atomic number of the complex [Co(NH₃)₆]Cl₃  is, from the given option.

Explanation :

The central metal atom's E.A.N. (Effective Atomic Number) is $\left[\mathrm{Co}{\left({\mathrm{NH}}_3\right)}_6\right]{\mathrm{Cl}}_3 is 36$.
E.A.N (Effective Atomic Number) = 27−3+12=36

Hence, the correct option  (D) .36