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': 'Which among is not a primary skin lesion of: \nSelect and explain. \nA. Plaque, B. Macule, C. Abscess, D. None', 'role': 'user'}, {'content': 'Answer: C \nExplanation: C. i.e. Abscess', 'role': 'assistant'}]