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': 'Preauricular sulcus is useful for: \nSelect and explain. \nA. Determination of age, B. Identification of sex, C. Determination of race, D. Cause of death', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Identification of sex', 'role': 'assistant'}]