This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Growth and development, Subject name: Pediatrics
Which of the following X-ray should be advised for age determination between 1-13 years of age 
Select and explain. 
A. Shoulder, B. Wrist, C. Elbow, D. Iliac bones
B: Wrist
Answer: B: Wrist 
Explanation: A bone age study helps doctors estimate the maturity of a child&;s skeletal system. It&;s usually done by taking a single X-ray of the left wrist, hand, and fingers. It is a safe and painless procedure that uses a small amount of radiation. ... The bone age is measured in years . Reference: GHAI Essential pediatrics, 8th edition