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
Treatment of choice for antrochoanal polyp: September 2009 
Select and explain. 
A. Intranasal polypectomy, B. Caldwell-Luc operation, C. Endoscopic sinus surgery, D. Intranasal ethmoidectomy
C: Endoscopic sinus surgery
Answer: C: Endoscopic sinus surgery 
Explanation: Ans. C: Endoscopic sinus surgery For the treatment of sinusitis, functional endoscopic sinus surgery (FESS) has superceded other modes, whereby normal clearance from the sinuses is restored by removing the anatomical and pathological obstructive variations that predispose to sinusitis. Caldwell-Luc operation is avoided.