11. Which of the following enzymes does not catalyze CO2 production? (1) isocitrate dehydrogenase,
(2) α- ketoglutarate dehydrogenase, (3) succinate dehydrogenase, (4) pyruvate dehydrogenase,
(5) malate dehydrogenase.
(A) only 2,
(B) only 5,
(C) 1 and 3,
(D) 3 and 5,
(E) 2 and 4.