Which of the following pairs of solutions will be isotonic to each other?

$0.01\mathrm{M}\text{ Potassium ferricyanide }+0.015\mathrm{M}\text{ Potassium nitrate }$

$0.01\text{ M Glucose }+0.01\text{ M Sodium chloride }$

$0.01\text{ M Potassium ferrocyanide }+0.02\mathrm{M}\text{ Calcium nitrate }$

$0.01\text{ M Magnesium chloride }+0.01\text{ M Mercurous nitrate }$