This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Pharynx, Subject name: ENT
[{'content': 'Killian dehiscence is seen in \nSelect and explain. \nA. Superior constrictor, B. Inferior constrictor, C. Middle constrictor, D. None', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Inferior constrictor muscle has two pas:- (i) Thyropharyngeous with oblique fibers, and (ii) Cricopharyngeous with transverse fibers Between these two pas of inferior constrictor exists a potential gap called Killian&;s dehiscence. It is also called the gateway to tear as perforation can occur at this site during esophagoscopy. It is also the site for herniation of pharyngeal mucosa in case of the pharyngeal pouch. Ref: PL Dhingra, Diseases of Ear, Nose & Throat, 7th edition, pg no. 269', 'role': 'assistant'}]