Identify the isotonic solutions from the following mixtures of aqueous solutions at 298 K, assuming complete dissociation of the electrolytes in water

A

100 mL of 0.5 M glucose solution and 110 mL of 0.2 M $$\text{CuSO}_4$$ solution

B

200 mL of 0.5 M acetamide solution and 300 mL of 0.1 M NaCl solution

C

400 mL of 0.1 M $$\text{BaCl}_2$$ solution and 100 mL of 0.2 M KCl solution

D

200 mL of 0.13 M $$\text{CaCl}_2$$ solution and 200 mL of 0.125 M HCl solution