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': 'Paralysisof 3rd, 4th, 6th nerves with involvement of ophthalmic division of 5th nerve, localizes the lesion to- \nSelect and explain. \nA. Cavernous sinus, B. Apex of orbit, C. Brainstem, D. Base of skull', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ipsilateral ophthalmoplegia causing diplopia occur due to 3rd, 4th & 6th cranial nerves. 6th nerve passes through cavernous sinus and others are related to the lateral wall of cavernous sinuses. Ref :ak khurana 6th edition pg no 410 REF IMG', 'role': 'assistant'}]