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: Anatomy
Vertical crest in fundus of the internal auditory canal is known as: 
Select and explain. 
A. Bill's bar, B. Ponticulus, C. c, Cog, D. Falciform crest
A: Bill's bar
Answer: A: Bill's bar 
Explanation: Ans. a. Bill's bar Vertical crest in fundus of the internal auditory canal is known as Bill's bar."Vertical crest in fundus of internal auditory canal is known as Bill's-barand it is used as a surgical landmark for facial nerve identification. Grays 40/e p636