This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Diseases of orbit, Lids and lacrimal apparatus, Subject name: Ophthalmology
[{'content': 'All nerves 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: Ipsilateral ophthalmoplegia due to 3rd, 4th ,& 6th cranial nerve involvement ptosis due to 3rd nerve paralysis. Ref .ak khurana 6th edition pg no 413', 'role': 'assistant'}]