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
An antrochoanal polyp is associated most commonly with 
Select and explain. 
A. Middle meatus, B. Sphenoethmoidal recess, C. Inferior meatus, D. Superior meatus
A: Middle meatus
Answer: A: Middle meatus 
Explanation: Antrochoanal polyp arises from the mucosa of the maxillary antrum near its accessory ostium, comes out of it and grows in the choana and nasal cavity. 
Hypertrophied middle turbinate, one of the important differential diagnosis, which is differentiated by its pink appearance and hard feel of the bone on probe testing. 
Antrochoanal polyps are most commonly associated with middle meatus.