<prompt> What is the location of Killian dehiscence?Below Superior constrictorBetween Inferior constrictorBelow cricopharyngeal muscleBelow upper 13rd of smooth muscle of oesophagus  <response>: Inferior constrictor muscle- Thyropharyngeus above and cricopharyngeus below In between Thyropharyngeus and cricopharyngeus muscle fibres, there is a dehiscence known as Kilians dehiscence. Protrusion of mucosa and submucosa Kilians dehiscence is known as Zenkers diveiculum. Larimers dehiscence- below cricopharyngeus 