This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Autoimmune skin disorders, Subject name: Dental
Fixed drug eruptions can be seen more frequently with 
Select and explain. 
A. Penicillin, B. Sulfonamide, C. Cetrizine, D. Roxithromycin
B: Sulfonamide
Answer: B: Sulfonamide 
Explanation: Fixed drug eruption It characteristically recur at the same site following administration of offending drugs or occasionally a member of the same group of drugs. They occur 30min to 8hrs after drug administration Most common drugs: Sulfonamides NSAIDS Dapsone Batbiturates Ciprofloxacin Phenytoin Griseofulvin Metronidazole Antituberculous drugs IADVL Textbook of dermatology page 1668