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: Anatomy
[{'content': 'Killian dehiscence is in - \nSelect and explain. \nA. Superior constrictor, B. Inferior constrictor, C. Middle constrictor, D. None', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. is \'b\' i.e., Inferior constrictor o Inferior constrictor has two partsUpper Propulsive Part - Thyropharyngeus with oblique fibers.Lower Sphineteric part - Cricopharyngeus with transverse fibers.o Between these two parts exists a potential gap called "Killian\'s dehiscence".o it is also called "Gateway of tears" as perforation can occur at this site during esophagoscopy.o This is also the site for herniation of pharyngeal mucosa in cases of pharyngeal pouch (pharyngeal diverticulum)', 'role': 'assistant'}]