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': 'Extended activity of ii-lactamases inactivate ? \nSelect and explain. \nA. Cephalosporins-III generation, B. Macrolides, C. Quinolone, D. Aminoglycosides', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Cephalosporins-III generation ESBL are lactamases that mediate resistance (by hydrolyzing) to extended spectrum (third generation) cephalosporins, penicillins and monobactams (e.g. aztreonam).", 'role': 'assistant'}]