Which Enzymes Catalyze Oxidation Reactions in the Citric Acid Cycle $\alpha$

Multiple Choice

Which enzymes catalyze oxidation reactions in the citric acid cycle? 1) succinate dehydrogenase
2) pyruvate dehydrogenase
3) citrate dehydrogenase
4) $\alpha$ -ketoglutarate dehydrogenase

A) 1 and 4
B) 1, 2, and 4
C) 1, 3, and 4
D) 2 and 3
E) All of the listed enzymes catalyze oxidation reactions in the citric acid cycle.