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': 'What is the purpose of preauricular sulcus in identification of a dead body? \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: Preauricular sulcus is present in pelvis, used for identification of sex in a skeleton. It is the attachment of anterior sacroiliac ligament. It is not frequent in males, if seen, it is narrow and shallow. It is more frequent in females and it is broad and deep. Ref: The Essentials of Forensic Medicine and Toxicology by Narayan Reddy, 27th edition, Page 56.', 'role': 'assistant'}]