This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Nasal Polyposis, Subject name: ENT
[{'content': 'The current treatment of choice for a large antrochoanal polyp in a 10-year-old is: \nSelect and explain. \nA. Intranasal polypectomy, B. Caldwell-Luc operation, C. FESS, D. Lateral rhinotomy and excision', 'role': 'user'}, {'content': 'Answer: C \nExplanation: (c) FESS(Ref. Cummings, 6th ed., 760)Antrochoanal polyp arise from the maxillary antrum and grow into the nasopharynx, hence they are always large at presentation and management is excision by FESS.', 'role': 'assistant'}]