In the reaction: pyruvate + CoA + NAD+ ? acetyl CoA + CO2 + NADH.
A. Pyruvate is reduced and CoA is oxidized.
B. Pyruvate is oxidized and CoA is reduced.
C. Pyruvate is reduced and NAD+ is oxidized.
D. Pyruvate is oxidized and NAD+ is reduced.
Answer: D
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