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: Skin
[{'content': 'Drug causing fixed drug eruption - \nSelect and explain. \nA. Sulfonamide, B. Erythromycin, C. Aminoglycoside, D. None', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Sulfonamide Drugs cadging fixed drug eruptiono Paracetamol (Phenacetin)o Sulfonamideso NSAIDso Aspirino Barbiturateso Dapsoneo Tetracyclineso Phenylbutazone", 'role': 'assistant'}]