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
The site of lodging foreign body in the esophagus is - 
Select and explain. 
A. Upper constrictor, B. Bifurcation of trachea, C. Aortic body, D. Lower esophagus
A: Upper constrictor
Answer: A: Upper constrictor 
Explanation: By far the most common site is at or just above the cricopharyngeal sphincter (upper constrictor).