Which of the Following Solutions Is Isotonic with the Solution $\degree$

Which of the following solutions is isotonic with the solution inside a red blood cell, which has an osmotic pressure of 7.89 atm at 37.0 $\degree$ C?

A) 0.155 M glucose (C₆H₁₂O₆)
B) 0.310 M sodium acetate (NaCH₃COO)
C) 0.155 M sodium phosphate (Na₃PO₄)
D) 0.155 M potassium chloride (KCl)
E) 0.310 M calcium chloride (CaCl₂)