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
Bone age is best estimated by 
Select and explain. 
A. History from the patient, B. X-ray of the teeth, C. Heredity, D. X-ray of the wrist
D: X-ray of the wrist
Answer: D: X-ray of the wrist 
Explanation: None