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
[{'content': 'Complications of sphenoid sinus surgery are all except: \nSelect and explain. \nA. CSF leak, B. Optic nerve injury, C. Lateral rectus palsy, D. Orbital emphysema', 'role': 'user'}, {'content': 'Answer: D \nExplanation: (d) Orbital emphysema(Ref. Cummings, 6th ed., 778)Orbital complications will follow maxillary, ethmoid and frontal sinus surgeries due to close proximity.', 'role': 'assistant'}]