This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Biochemistry
[{'content': 'Pyruvate dehydrogenase contains all, except - \nSelect and explain. \nA. NAD, B. FAD, C. Biotin, D. CoA', 'role': 'user'}, {'content': 'Answer: C \nExplanation: PDH complex is made up of three enzymes and requires five coenzymes.The enzymes are :i) E1 : Pyruvate dehydrogenase or pyruvate decarboxylaseii) E2 : Dihydrolipoyl transacetylaseiii) E3 : Dihydrolipoyl dehydrogenase.The coenzyme required are thiamine pyrophosphate (APP), lipoic acid, FAD, NAD, and CoA.', 'role': 'assistant'}]