system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
Pre auricular sulcus is a pa of ?
assistant
The correct answer is  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.