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: Pharmacology
[{'content': 'Cyt-P-450 is inhibited by- \nSelect and explain. \nA. Phenobarbitone, B. Cimetidine, C. Phenytoin, D. CCI4', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Cimetidine", 'role': 'assistant'}]