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': "Patient reports with discolored teeth bearing brown\nstains. The teeth glow fluorescent in UV Light. The most likely diagnosis is: \nSelect and explain. \nA. Porphyria, B. Amelogenesis imperfecta, C. Hutchinson's teeth, D. Tetracycline staining of teeth", 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]