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 median round Lesion in front of circumvallate papillae,\nwith epithelial hyperplasia diagnosis is: \nSelect and explain. \nA. Median rhomboid glossitis, B. Erythema migrans, C. Apthous ulcer, D. Chemical burn', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]