Killian's dehiscence is seen in -: (A) Oropharynx, (B) Nasopharynx, (C) Cricopharynx, (D) Vocal cords
Answer is C. 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.