<prompt> Vertical crest in fundus of the internal auditory canal is known as:Bills barPonticulusc, CogFalciform crest  <response>: Ans. a. Bills bar Vertical crest in fundus of the internal auditory canal is known as Bills bar.Vertical crest in fundus of internal auditory canal is known as Bills-barand it is used as a surgical landmark for facial nerve identification. Grays 40e p636 