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: ENT
Killian's dehiscence is in 
Select and explain. 
A. Superior constrictor, B. Inferior constrictor, C. Middle constrictor, D. None
B: Inferior constrictor
Answer: B: Inferior constrictor 
Explanation: Inferior constrictor muscle has two parts. 
Thyropharyngeus with oblique fibres and cricopharyngeus with transverse fibres.
Between these two parts exists a potential gap called "Killian's dehiscence". It is also called "Gateway of tears". 
This is also the site of herniation of pharyngeal mucosa in case of the pharyngeal pouch.