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': 'Jarisch–Herxheimer reaction is seen in syphilis with : \nSelect and explain. \nA. Tetracyclines, B. Penicillins, C. Co-trimoxazole, D. Sulfonamides', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]