This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: ENT
Most common site of rupture of esophagus during rigid esophagoscopy is at 
Select and explain. 
A. Above cricopharynx, B. Near vocal cord, C. GE junction, D. At killian's dehiscence
D: At killian's dehiscence
Answer: D: At killian's dehiscence 
Explanation: Complications of Rigid esophagoscopv Injury to lips and teeth. Injury to arytenoids. Injury to pharyngeal mucosa. Perforation of esophagus; most often it occurs at the site of killians dehiscence (near the cricopharyngeal sphincter). Compression of trachea.