Which of the following complex follows Sidgwick's rule of EAN? 

(Pt-78, Ag-47, Fe-26, V-23)

Since the value of EAN for  ${\left[\mathrm{Pt}(\mathrm{en}{)}_2{\mathrm{Cl}}_2\right]}^{2+}$ is 86. It does not follow Sidgwick's rule of EAN.

$\begin{array}{l}\Rightarrow EAN=78-4+6\times 2\\ \Rightarrow EAN=86\end{array}$

Hence the correct option is D.