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
Treatment of choice in bilateral ethmoidal polyp is 
Select and explain. 
A. Ethmoidectomy, B. FESS, C. Endoscopic removal, D. Chemotherapy and Radiotherapy
B: FESS
Answer: B: FESS 
Explanation: Ref : Dhingra 7e pg 195.