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
Antrochoanal polyp is characterized by: 
Select and explain. 
A. Usually bilateral, B. It is of allergic origin, C. It arises from maxillary antrum, D. All
C: It arises from maxillary antrum
Answer: C: It arises from maxillary antrum 
Explanation: Nasal polyps are non-neoplastic masses of edematous nasal or sinus mucosa. They do not bleed on touch and are insensitive to probing and never present with epistaxis or bleeding from nose. Recurrence is uncommon in case of antrochoanal polyp. Antrochoanal polyps arise from maxillary arum and then grow into choana and nasal cavity.