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': 'Comedones are characteristics of - \nSelect and explain. \nA. Acne vulgaris, B. Acne rosasea, C. SLE, D. Adenoma sebaeceum', 'role': 'user'}, {'content': 'Answer: A \nExplanation: A. i.e. Acne Vulgaris', 'role': 'assistant'}]