Correct option (c) oxidative decarboxylation
Explanation:
Pyruvic acid formed as a result of glycolysis, enters mitochondria and undergoes oxidative decarboxylation to form acetyl CoA, NADH and evolve CO2.The reaction occurs in the presence of enzyme complex pyruvate dehydrogenase. Acetyl CoA then undergoes oxidation to form CO2 and H2O through Krebs' cycle in mitochondrial matrix.