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': 'In chronic alcoholism the rate limiting component for alcohol metabolism excluding enzymes is / are: \nSelect and explain. \nA. NADP, B. NAD, C. None, D. FADH', 'role': 'user'}, {'content': 'Answer: B \nExplanation: NAD', 'role': 'assistant'}]