<prompt> Which of the following is true about Torous tubarius?Nasopharyngeal bursitisMost common site of carcinoma NasopharynxTubal elevation in lateral wall of NasopharynxGives rise to Rathkes pouch  <response>: Lateral wall of nasopharynx - Each lateral wall presents pharyngeal opening of eustachian tube situated 1.25cm behind posterior end of inferior turbinate Bounded above and behind by an elevation called Torous Tubarius. Raised by the cailage of the tube Above and behind the tubal elevation is a recess - fossa of Rosenmuller commonest site for origin of carcinoma A ridge extends from the lower end of torus tubarius to the lateral pharyngeal wall - salpingopharyngeal fold. 