This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Head and neck, Subject name: Anatomy
[{'content': '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: The auditory tube passes between the large gap between the upper concave border of the superior constrictor and the base of the skull is semilunar and is known as the sinus of Morgagni. It is closed by the upper strong pa of the pharyngobasilar fascia. Ref: BD Chaurasia's HUMAN ANATOMY, Volume 3, 4th edition.", 'role': 'assistant'}]