This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Pathology
[{'content': 'The level of drug metabolizing enzymes in the liver determines how fast a drug is removed from the circulation. Therefore, it would be expected to find drug metabolizing enzymes \nSelect and explain. \nA. Higher in smokers than in nonsmokers, B. Similar in smokers and nonsmokers, C. Lower in smokers than in nonsmokers, D. Simulated by malnutri on', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Smokers inhale polycyclic aromatic hydrocarbons, which stimulate drug-metabolizing enzymes. Therefore, smokers have higher levels of hepa c drug-metabolizing enzymes than nonsmokers.', 'role': 'assistant'}]