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
[{'content': 'Regarding antrochonal polyp which one is true - \nSelect and explain. \nA. Origin from maxillary sinus and goes to nasopharynx, B. Present with severe bleeding, C. Bilateral, D. Seen in elderly person', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Antrochoanal polyp arises from maxillary sinus and grows backward in the nose towards the choana, and can reach nasopharynx.', 'role': 'assistant'}]