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 permanent tooth with a local hypoplastic deformity in a crown is called \nSelect and explain. \nA. Turner's tooth, B. Taurodontism, C. Enameloma, D. Ghost teeth", 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]