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': 'Most useful for sex determination is: Kerala 08 \nSelect and explain. \nA. Skull, B. Femur, C. Pelvis, D. Tibia', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ans. Pelvis', 'role': 'assistant'}]