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 disease which only affects the formation and eruption of the tooth but does not cause  \nhypoplasia is? \nSelect and explain. \nA. Hyperthyroidism, B. Hypothyroidism, C. Vitamin A deficiency, D. All of the above', 'role': 'user'}, {'content': "Answer: A \nExplanation: Hyperthyroidism does not cause hypoplasia.\nIn children, shedding of the deciduous teeth occurs earlier than normal, and eruption of the permanent teeth is greatly accelerated.\nRef: Shafer's textbook of oral pathology 7th edition page 652", 'role': 'assistant'}]