Pick out from the following complex compounds, a poor electrolytic conductor in solution?

$\left[\mathrm{Co}{\left({\mathrm{NH}}_3\right)}_3{\left({\mathrm{NO}}_2\right)}_3\right]$ There is no ions out of the coordination sphere thus it is poor conductor in electrolytic solution ${\mathrm{K}}_2\left[{\mathrm{PtCl}}_6\right]=3$ ions
$\left[\mathrm{Co}{\left({\mathrm{NH}}_3\right)}_3{\left({\mathrm{NO}}_2\right)}_3\right]=$ out of the coordination sphere no ions (non ionisable)
${\mathrm{K}}_4\left[\mathrm{Fe}{\left(\mathrm{CN}\right)}_6\right]=5$ ions
$\left[\mathrm{Co}{\left({\mathrm{NH}}_3\right)}_4\right].{\mathrm{SO}}_4=2$ ions
More ions $\propto$ more conductivity