What Is the E ^$\circ$ ' for the Spontaneous Reaction That Would Result If

Multiple Choice

What is the E ^$\circ$ ' for the spontaneous reaction that would result if the following reactions were coupled? NAD⁺ + H⁺ + 2e^- $\rarr$ NADH E ^$\circ$ ' = -0.32 V
Pyruvate + 2H⁺ + 2e^- $\rarr$ 0 lactate E ^$\circ$ ' = -0.19 V

A) -0.51 V
B) -0.13 V
C) +0.13 V
D) +0.51 V
E) none of the above