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 are beta lactamase inhibitors except- \nSelect and explain. \nA. Clavulanic acid, B. Sulbactam, C. Tazobactam, D. Aztreonam', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. is 'd' i.e., Aztreonam beta-lactamase inhibitors are clavulanic acid, sulbactam and tazobactam.", 'role': 'assistant'}]