This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General anatomy, Subject name: Anatomy
[{'content': 'CYP 450 inducers are \nSelect and explain. \nA. Cimetidine, B. Ketokonazole, C. Phenobarbitone, D. Theoplylline', 'role': 'user'}, {'content': 'Answer: C \nExplanation: P-450 inducers are: Phenobarbitone, rifampicin, phenytoin, chloe hydrate, phenylbutazone, griseofulvin, DDT, an chronic alcohol ingestion. Ketoconazole and cimetidine inhibit the drug metabolizing enzymes. Ref-KDT 7/e p26', 'role': 'assistant'}]