Which of the Following Substances Has the Highest Renal Clearance $\mathrm{Na}^{+}$

Which of the following substances has the highest renal clearance?

A) Para-aminohippuric acid (PAH)
B) Inulin
C) Glucose
D) $\mathrm{Na}^{+}$
E) $\mathrm{Cl}^{-}$