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: Skin
[{'content': 'Recalcitrant Pustular Acne is treated by \nSelect and explain. \nA. Oral Erythromycin, B. Oral tetracycline, C. Steriod, D. Retinoid', 'role': 'user'}, {'content': 'Answer: D \nExplanation: D i.e. Retonoid', 'role': 'assistant'}]