A Solution Contains 43 MEq/L of Of Cl^- and 11

Multiple Choice

A solution contains 43 mEq/L of of Cl^- and 11 mEq/L of HPO₄^-2 .If the only cation in the solution is Na⁺ ,what is the Na⁺ concentration in mEq/L?

A) 43 mEq/L
B) 11 mEq/L
C) 54 mEq/L
D) 32 mEq/L
E) 2.0 mEq/L