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

Multiple Choice

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° value of -474 kJ/mol.What is the standard cell potential for this fuel cell?
2 H₂ (g) + O₂ (g) $\rightarrow$ 2 H₂ O(l)

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