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: Medicine
The commonest site for impaction of foreign body in the Gastro Intestinal Tract is 
Select and explain. 
A. Ileocaecal junction, B. Pyriform fossa, C. Pyloric sphincter, D. Cricopharynx
D: Cricopharynx
Answer: D: Cricopharynx 
Explanation: None