This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Acne, Subject name: Skin
[{'content': 'Comedons are characteristics of: \nSelect and explain. \nA. Acne vulgaris, B. Acne rosasea, C. SLE, D. d. Adenoma sebaceum', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans is 'a' i.e, Acne vulgaris", 'role': 'assistant'}]