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
[{'content': 'The age of a 16 years old female is best determined by the radiograph of : \nSelect and explain. \nA. Lower end of radius and Ulna, B. Upper end of humerus, C. Upper end of radius and Ulna, D. Xiphisternum', 'role': 'user'}, {'content': 'Answer: A \nExplanation: A i.e. Lower end of radius & ulna', 'role': 'assistant'}]