This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Metabolism of carbohydrate, Subject name: Biochemistry
[{'content': 'In TCA cycle, NADH is produced at all sites except \nSelect and explain. \nA. Isocitrate dehydrogenase, B. Succinate dehydrogenase, C. Malate dehydrogenase, D. Pyruvate dehydrogenase', 'role': 'user'}, {'content': 'Answer: B \nExplanation: 6th Step: Formation of Fumarate Succinate is dehydrogenated to fumarate, an unsaturated dicarboxylic acid, by succinate dehydrogenase (step 6, Fig.18.2). The hydrogen atoms are accepted by FAD. The FADH2 then enters into ETC to generate ATPs.Ref: DM Vasudevan, 7th edition, page no: 248', 'role': 'assistant'}]