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
Regarding antrochonal polyp which one is true - 
Select and explain. 
A. Origin from maxillary sinus and goes to nasopharynx, B. Present with severe bleeding, C. Bilateral, D. Seen in elderly person
A: Origin from maxillary sinus and goes to nasopharynx
Answer: A: Origin from maxillary sinus and goes to nasopharynx 
Explanation: Antrochoanal polyp arises from maxillary sinus and grows backward in the nose towards the choana, and can reach nasopharynx.