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': 'Deficiency of which vitamin affects tooth development? \nSelect and explain. \nA. Carbohydrates, B. Vitamin E, C. Vitamin B, D. Vitamin A', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]