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
A permanent tooth with a local hypoplastic deformity in a crown is called 
Select and explain. 
A. Turner's tooth, B. Taurodontism, C. Enameloma, D. Ghost teeth
A: Turner's tooth
Answer: A: Turner's tooth 
Explanation: None