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: Dental
[{'content': 'Bone age is best estimated by \nSelect and explain. \nA. History from the patient, B. X-ray of the teeth, C. Heredity, D. X-ray of the wrist', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]