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': 'NAD+ is reduced to NADH + H+ by dehydrogenases of all the following substrates, Except \nSelect and explain. \nA. Pyruvate, B. Glyceraldehyde-3-phosphate, C. Malate, D. Succinate', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Reference: Harper&;s Biochemistry; 30th edition; Chapter 8; Enzyme kinetics', 'role': 'assistant'}]