This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Nose and PNS, Subject name: ENT
A 35-year-old male presented with nasal discharge, facial pain and fever which persisted with several courses of antibiotics and antihistaminics over a period of 3 months. On nasal endoscopy mucopurulent discharge from middle meatus and inflamed sinus openings seen. His NCCT nose and PNS is given below. He should be best managed by: 
Select and explain. 
A. Repeated antral washout, B. Functional endoscopic sinus surgery, C. Caldwell-Luc operation, D. Lynch Howarth operation
B: Functional endoscopic sinus surgery
Answer: B: Functional endoscopic sinus surgery 
Explanation: (b) Functional endoscopic sinus surgery(Ref. Scott Brown, 8th ed., Vol 1; 1072)NCCT shows left maxillary sinus (asterisk) haziness s/o sinusitis.