The number of pairs of the solutions having the same value of the osmotic pressure from the following is _________.

(Assume 100% ionization)

A. 0.500 $\mathrm{M~C_2H_5OH~(aq)}$ and 0.25 $\mathrm{M~KBr~(aq)}$

B. 0.100 $\mathrm{M~K_4[Fe(CN)_6]~(aq)}$ and 0.100 $\mathrm{M~FeSO_4(NH_4)_2SO_4~(aq)}$

C. 0.05 $\mathrm{M~K_4[Fe(CN)_6]~(aq)}$ and 0.25 $\mathrm{M~NaCl~(aq)}$

D. 0.15 $\mathrm{M~NaCl~(aq)}$ and 0.1 $\mathrm{M~BaCl_2~(aq)}$

E. 0.02 $\mathrm{M~KCl.MgCl_2.6H_2O~(aq)}$ and 0.05 $\mathrm{M~KCl~(aq)}$