This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Chemotherapy, Subject name: Pharmacology
[{'content': 'Which among the following is not a beta-lactamase inhibitor? \nSelect and explain. \nA. Sulbactam, B. Calvulanic acid, C. Piperacillin, D. Tazobactam', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Beta-lactamase inhibitors: Clavulanic acid, Sulbactam, Tazobactam They are potent inhibitors of many bacterial b lactamases and can protect hydrolyzable penicillins from inactivation by these enzymesKatzung 12e 801', 'role': 'assistant'}]