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: Forensic Medicine
The age of a 16 years old female is best determined by the radiograph of : 
Select and explain. 
A. Lower end of radius and Ulna, B. Upper end of humerus, C. Upper end of radius and Ulna, D. Xiphisternum
A: Lower end of radius and Ulna
Answer: A: Lower end of radius and Ulna 
Explanation: A i.e. Lower end of radius & ulna