This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Ophthalmology
[{'content': 'UNILATERAL proptosis with BILATERAL sixth nerve palsy \nSelect and explain. \nA. cavernous sinus thrombosis, B. thyroid ophthalmopathy, C. Retinoblastoma, D. Orbital psuedotumour', 'role': 'user'}, {'content': 'Answer: A \nExplanation: IN CAVERNOUS SINUS THROMBOSIS : Abduscent Nerve has high chance of being affected ref : ak khurana 7th ed', 'role': 'assistant'}]