In oxidative phosphorylation, when $N^{+}AD$ becomes $NADH$, which process is occurring?

• A. $N^{+}AD$ is being hydrolyzed to release inorganic phosphate.
• B. $N^{+}AD$ is being reduced by gaining a hydride equivalent (electrons).
• C. $N^{+}AD$ is being oxidized by losing electrons.
• D. $N^{+}AD$ is being phosphorylated by ATP synthase.

Answer: (B)