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': 'Pre auricular sulcus is a pa of ? \nSelect and explain. \nA. Humerus, B. Femur, C. Pelvis, D. Skull', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. is `c' i.e., Pelvis Preauricular sulcus is used for determination of sex. It is more frequent, broad and deep in female pelvis. There is attachment of anterior sacroiliac ligament.", 'role': 'assistant'}]