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': 'All of the following have interaction with warfarin except- \nSelect and explain. \nA. Barbiturate, B. Oral contraceptive, C. Cephalosporins, D. Benzodiazepens', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. is 'd' i.e., Benzodiazepenes", 'role': 'assistant'}]