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: Pathology
[{'content': 'A flat, circumscribed discolouration of skin or mucosa\nthat may vary in size and shape is referred to as \nSelect and explain. \nA. Epulis, B. Macule, C. Nodule, D. Papule', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]