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 beta lactamases inactivate: \nSelect and explain. \nA. Cephalosporins-III generation, B. Macrolides, C. Quinolones, D. Quinolones', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Cephalosporins-III generation', 'role': 'assistant'}]