Answer:
The correct answer is - Coenzyme A.
Step-by-step explanation:
Pyruvate oxidation is the process that is called a link reaction during cellular respiration between glycolysis and the TCA cycle. In this link reaction, the pyruvate is converted into acetyl coenzyme, a three-carbon product used as the reactant in the TCA cycle.
The reactant in the pyruvate oxidation is coenzyme A is a necessary reactant for this reaction, which reduces NAD+ to NADH and releases a molecule of carbon dioxide.