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
Pre auricular sulcus is a pa of ? 
Select and explain. 
A. Humerus, B. Femur, C. Pelvis, D. Skull
C: Pelvis
Answer: C: Pelvis 
Explanation: 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.