This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Orbit, Subject name: Ophthalmology
[{'content': 'All nerve are involved in superior orbital fissure syndrome except - \nSelect and explain. \nA. 1st, B. 3rd, C. 4th, D. 6th', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., 1stSuperior orbital fissure syndromeo The superior orbital fissure is a cleft between the lesser and greater wing of sphenoid.o The structures passed through superior orbital fissure are 3rd, 4th, 6th nerve, ophthalmic division of 5th nerve, superior & inferior division of ophthalmic vein and sympathetic fibres,o Therefore symptoms of superior orbital fissure syndrome are same as in cavernous sinus thrombosis, i.e., painful ophthalmoplegia :-Pain (retro-orbital pain) and sensory disturbances in the V] (ophthalmic division of 5th nerve)distributionIpsilateral ophthalmoplegia (3rd, 4th and 6th nerve involvement).", 'role': 'assistant'}]