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 seen in - 
Select and explain. 
A. Oropharynx, B. Nasopharynx, C. Cricopharynx, D. Vocal cords
C: Cricopharynx
Answer: C: Cricopharynx 
Explanation: Between these two parts 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.