How many of the following obey's Sidgwick EAN rule?

(a) ${\mathrm{K}}_4\left[\mathrm{Fe}(\mathrm{CN}{)}_6\right]$            (b) ${\mathrm{K}}_3\left[\mathrm{Fe}(\mathrm{CN}{)}_6\right]$

(c) ${\mathrm{Mn}}_2(\mathrm{CO}{)}_{10}$               (d) $\left[\mathrm{Fe}{\left({\mathrm{H}}_2\mathrm{O}\right)}_5{\mathrm{NO}}_3{\mathrm{SO}}_4\right.$

(e) ${\mathrm{Na}}_2\left[\mathrm{Fe}(\mathrm{CN}{)}_5\mathrm{NO}\right]$  (f) $\left[{\mathrm{Co}}_2(\mathrm{CO}{)}_8\right]$

(g) $\left[\mathrm{Fe}{\left(\pi -{\mathrm{C}}_5{\mathrm{H}}_5\right)}_2\right]$

Sidgwick made the observation, since known as the EAN rule, that in a number of metal complexes the metal atom tends to surround itself with sufficient ligands that the resulting effective atomic number is numerically equal to the atomic number of the noble-gas element found in the same period in which the metal is 

(a) ${\mathrm{K}}_4\left[\mathrm{Fe}(\mathrm{CN}{)}_6\right]$ , (c) ${\mathrm{Mn}}_2(\mathrm{CO}{)}_{10}$, (e)${\mathrm{Na}}_2\left[\mathrm{Fe}(\mathrm{CN}{)}_5\mathrm{NO}\right]$, (f) $\left[{\mathrm{Co}}_2(\mathrm{CO}{)}_8\right]$, (g) $\left[\mathrm{Fe}{\left(\pi -{\mathrm{C}}_5{\mathrm{H}}_5\right)}_2\right]$

Hence correct answer is 0005