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: Medicine
[{'content': 'Abnormalities of bone metabolism is associated with excess of which vitamins \nSelect and explain. \nA. Vitamin A, B. Thiamine, C. Vitamin B12, D. All', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Answer is A (Vitamin A ): Hypercalcemia is associated with Vitamin A intoxication due to increased / high bone turnover and Vitamin D intoxication.', 'role': 'assistant'}]