Which of the following is known as "Gateway of tears" -
Inferior constrictor muscle has 2 parts; thyropharyngeus with oblique fibres and cricopharyngeus with transverse fibres. Between these 2 parts, there is a potential gap called as killians dehiscence or gateway of tears as perforation can occur at this site during oesophagoscopy and it is also the site for herniation of pharyngeal mucosa in case of the pharyngeal pouch.
Killian's dehiscence
Rathke's pouch
Waldeyer's ring
Sinus of Morgagni