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': 'The Eustachian tube passes between - \nSelect and explain. \nA. Superior and middle constrictors, B. Above superior constrictor, C. Middle and inferior constrictor, D. Below inferior constrictor', 'role': 'user'}, {'content': 'Answer: B \nExplanation: GAPS BETWEEN PHARYNGEAL MUSCLES AND RELATED STRUCTURES\nI. Between the base of the skull and superior constrictor i.e. above superior constrictor (Sinus of Morgagni) :\n\nLevator veli palatini\nAuditory tube(eustachian tube)\nAscending palatine artery\n\nII. Between superior and middle constrictors :\n\nStylopharyngeus muscle\nGlossopharyngeal nerve\n\nIII. Between Middle and Inferior constrictors :\n\nInternal laryngeal nerve\nSuperior laryngeal vessels\n\nThese structures pierce the thyrohyoid membrane.\nIV.\xa0Between lower border of inferior constrictor and esophagus :\n\nRecurrent laryngeal nerve\nInferior laryngeal vessels', 'role': 'assistant'}]