This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Oral cavity & Oesophagus, Subject name: ENT
The most common site of rupture of the esophagus during rigid esophagoscopy is at 
Select and explain. 
A. Above cricopharynx, B. Near vocal cords, C. Gastroesophageal junction, D. At killian's dehiscence
D: At killian's dehiscence
Answer: D: At killian's dehiscence 
Explanation: Complications of Rigid esophagoscopyInjury to lips and teethInjury to arytenoidsInjury to pharyngeal mucosaPerforation of the esophagus; most often it occurs at the site of killian&;s dehiscence (near the cricopharyngeal sphincter)Compression of tracheaRef: PL Dhingra, Diseases of Ear, Nose & Throat, 7th edition, pg no. 486 - 487