30. Which of the following processes constitute the two-step reaction catalyzed by isocitrate dehydrogenase involves? A. β-decarboxylation expelling the a-keto carboxyl as CO2., B. oxidation of the C-2 alcohol of isocitrate to form oxalosuccinate.,C. oxidation of the C-2 alcohol to form oxaloacetate., D. β-elimination expelling the central carboxyI group as CO2. (A) A and B (B) Band C (C) Cand D (D) A and C (E) Band D