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
Fixed drug eruptions are frequently seen with? 
Select and explain. 
A. Penicillin, B. Sulfonamide, C. Cetirizine, D. Roxithromycin
B: Sulfonamide
Answer: B: Sulfonamide 
Explanation: Ans. B. SulfonamideDrugs causing fixed drug eruptionParacetamol (Phenacetin)SulfonamidesNSAIDsAspirinBarbituratesDapsoneTetracyclinesPhenylbutazone