This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Nose and paranasal sinuses, Subject name: ENT
[{'content': '15.Antrochoanal polyp is characterized by: \nSelect and explain. \nA. Usually bilateral, B. It is of allergic origin, C. It arises from maxillary antrum, D. Caldwell luc operation is treatment of choice in recurrent cases', 'role': 'user'}, {'content': 'Answer: D \nExplanation: C and D Nasal polyos are non neoplastic mases of edematous nasal or sinus mucosa.They do not bleed on touch. Recurrence is uncommon in case of antrochoanal polyp Antrochoanalpolyps arise from maxillary antrum and then grow into choana and nasal cavity Ref Dhingra 6/e p 174,175', 'role': 'assistant'}]