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': 'Premature exfoliation of deciduous teeth is seen in \nSelect and explain. \nA. Hypophosphatasia, B. Hypophosphaterria, C. Hyper phosphtasia, D. Hyperparathryroidism', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]