This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Identification, Subject name: Forensic Medicine
Pre-auricular sulcus helps in detection of - 
Select and explain. 
A. Age, B. Sex, C. Race, D. Height
B: Sex
Answer: B: Sex 
Explanation: Pre auricular sulcus is more frequent, broad and deep in female pelvis as compared to male. ref : Dr. Narayana Reddys Synopsis of Forensic Medicine & Toxicology 27 th edition pg. 32.