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': 'For a girl of 18 years, site for X-ray to determine her age is: PGI 07 \nSelect and explain. \nA. Elbow, B. Wrist, C. Knee, D. Ankle Joint', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. Wrist', 'role': 'assistant'}]