The Oxidation of Hydrogen by Oxygen Is One of the Most-Used

The oxidation of hydrogen by oxygen is one of the most-used reactions in fuel-cell technology. The overall reaction, which is given below, has a $\Delta$ G ^$\circ$ value of -474 kJ/mol. What is the standard cell potential for this fuel cell?

A) 2.46 V
B) 4.91 V
C) 1.23 V
D) 3.05 V
E) 1.50 V