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: Gynaecology & Obstetrics
[{'content': 'Pre-auricular sulcus is seen in: March 2004 \nSelect and explain. \nA. Ear, B. Skull, C. Pelvis, D. Femur', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ans. C i.e. Pelvis', 'role': 'assistant'}]