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
Indication of FESS: 
Select and explain. 
A. inveed papilloma, B. Orbital abscess, C. Nasal polyposis, D. Opticnerve decompression
B: Orbital abscess
Answer: B: Orbital abscess 
Explanation: All options are correct. Indications of FESS A. nasal conditions:sinusitis, polyp removal, mucocele,choanal attesoa repair, septoplasty, foreign body removal, epustaxis B. Other conditions: Nose is separated from orbit by lamina papyracea, anterior cranial fossa bu cribriform plate and pituitary by sphenoid. Hence FESS can be used in: orbital conditions:- Orbital decompression optic nerve decompression blow out of orbit drainage of periorbital abscess Drarhocystorhinostomy. Ref Dhingra 6/e,p 419.