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: ENT
[{'content': 'True about cavernous sinus thrombosis \nSelect and explain. \nA. Pupils are dilated, B. Enophthalmos, C. Unilateral, D. Slow onset', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]