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
Jarisch–Herxheimer reaction is seen in syphilis with : 
Select and explain. 
A. Tetracyclines, B. Penicillins, C. Co-trimoxazole, D. Sulfonamides
B: Penicillins
Answer: B: Penicillins 
Explanation: None