What Is the [H⁺] in a Concentration Cell at 25

Multiple Choice

What is the [H⁺] in a concentration cell at 25 °C if the cell potential is 0.0451 V and cell diagram:
Pt(s) ∣ H₂ (g,1 atm) ∣ H⁺(?) H⁺ (aq,1 M) ∣ H₂(g,1 atm)
2 H⁺(aq) + 2 e^- → H₂(g) E° = 0.V

A) 0.51 M
B) 0.42 M
C) 0.030 M
D) 0.17 M
E) 5.7 M