This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Ear, Subject name: ENT
[{'content': 'Surgical markings for finding the facial nerve is/are \nSelect and explain. \nA. Tympano-mastoid suture, B. Tragal pointer, C. Posterior belly of digastric, D. All of the above', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Facial nerve runs behind this suture in the veical or mastoid segment. Ref: Dhingra 6th edition pg. 91', 'role': 'assistant'}]