<prompt> The Eustachian tube passes between -Superior and middle constrictorsAbove superior constrictorMiddle and inferior constrictorBelow inferior constrictor  <response>: GAPS BETWEEN PHARYNGEAL MUSCLES AND RELATED STRUCTURESI. Between the base of the skull and superior constrictor i.e. above superior constrictor Sinus of Morgagni :Levator veli palatiniAuditory tubeeustachian tubeAscending palatine arteryII. Between superior and middle constrictors :Stylopharyngeus muscleGlossopharyngeal nerveIII. Between Middle and Inferior constrictors :Internal laryngeal nerveSuperior laryngeal vesselsThese structures pierce the thyrohyoid membrane.IV. Between lower border of inferior constrictor and esophagus :Recurrent laryngeal nerveInferior laryngeal vessels 