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: Radiology
[{'content': 'A patient gives a history of previous chronic abscess on the deciduous precursor of 11. The following radiograph indicates: \nSelect and explain. \nA. Enamel hypoplasia, B. Turner’s hypoplasia, C. Amelogenesis imperfecta, D. Dentinogenesis imperfecta', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Turner’s Hypoplasia\nThis condition represents a defect occurring during amelogenesis that is the result of either local trauma or infection originating from the deciduous predecessor.\nRadiological signs\nIf the deformity is minimal, the tooth will show\xa0a localized area of hypoplasia. A prolonged disturbance will lead to pronounced changes in tooth morphology that include gross deformity, irregularity and a reduction in crown size.\nKey Concept', 'role': 'assistant'}]