This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: ENT
[{'content': 'All of the following are treatments of multiple bilateral ethmoidal polyps except? \nSelect and explain. \nA. Functional endoscopic sinus surgery, B. Intranasal ethmoidectomy, C. Extranasal ethmoidectomy, D. Caldwll Luc Surgery', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Surgical treatment of ethmoidal polyps : Functional endoscopic sinus surgery (FESS) : Surgery of choice when available. Polypectomy : When there are one or two pedunculated polyps. Intranasal ethmoidectomy : Indicated when polyps are multiple and sessile. Extranasal ethmoidectomy : This is indicated when polyps recur after intranasal procedures. Transantral ethmoidectomy : Indicated when infection and polypoidal changes are also seen in the maxillary antrum. In this case antrum is opened by caldwell-Luc approach and the ethmoidal air cells approached through the medial wall of the antrum. Ref : HAZARIKA 3RD ED.', 'role': 'assistant'}]