This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: FMGE 2019, Subject name: ENT
Killian's Dehiscence is seen at the level of: 
Select and explain. 
A. Superior Constrictor, B. Middle constrictor, C. Inferior Constrictor, D. Thyroepiglottis
C: Inferior Constrictor
Answer: C: Inferior Constrictor 
Explanation: Killian dehiscence also known as "Gateway of tears'' M/C site for esophageal tear (perforation) In posterior pharyngeal wall the inferior constrictor muscle is divide into two pa thyropharyngeus and cricopharyngeus. Thyropharyngeus has oblique fibers Cricopharyngeus has Transverse fibers. And that creates a triangular space. This is anatomical week space is known as Killian dehiscence.