In which of the following pairs of solutions will the values of the van’t Hoff factor be the same?

$$\begin{gathered} 0.05\text{}\mathrm{M}\text{\hspace{0.17em}}{\mathrm{FeSO}}_4{\left({\mathrm{NH}}_4\right)}_2{\mathrm{SO}}_4.6{\mathrm{H}}_2\mathrm{O} \\ \& \\ 0.05\mathrm{M}\mathrm{KCl} {\mathrm{MgCl}}_2.6{\mathrm{H}}_2\mathrm{O} \end{gathered}$$

$0.20\mathrm{M}\text{}\mathrm{NaCl}\mathrm{and}\text{\hspace{0.17em}\hspace{0.17em}}0.10\text{\hspace{0.17em}}\mathrm{M}\text{}{\mathrm{BaCl}}_2$

$0.05\mathrm{M}{\mathrm{K}}_4\left[\mathrm{Fe}{\left(\mathrm{CN}\right)}_6\right]\mathrm{and}0.10\mathrm{M}{\mathrm{FeSO}}_4$

All the options have same value