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: Anatomy
[{'content': "Veical crest in fundus of the internal auditary canal is k/a: \nSelect and explain. \nA. Bill's bar, B. Ponticul us, C. Cog, D. Falciform crest", 'role': 'user'}, {'content': "Answer: A \nExplanation: A ie Bill's Bar Veical crest in fundus of internal auditory canal is K/a Bill's -bar(2. And it is used as a surgical landmark for facial nerve identification.", 'role': 'assistant'}]