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': 'Best bone to assess age between 20-50 years: \nSelect and explain. \nA. Skull, B. Ribs, C. Sternum, D. Symphysis pubis', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ans. Symphysis pubis', 'role': 'assistant'}]