This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Ophthalmology
[{'content': 'Most often the first sign of involvement of opposite side in cavernous sinus thrombosis is: \nSelect and explain. \nA. Paralysis of opposite lateral rectus muscle, B. Proptosis of the opposite side, C. Paralysis of opposite 3rd nerve, D. All of the above', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. Paralysis of opposite lateral rectus muscle', 'role': 'assistant'}]