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': 'In the recent decade Gonococcus become resistant to all the following drugs, EXCEPT: \nSelect and explain. \nA. Penicillin G, B. Azithromycin, C. Tetracycline, D. Ciprofloxacin', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Treatment azithromycin 1g po single dose till now not repoed resistance. Ref: KDT, 6th Edition, Page 737', 'role': 'assistant'}]