This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General anatomy, Subject name: Anatomy
[{'content': 'Most common cause of bilateral Proptosis is \nSelect and explain. \nA. Thyrotoxicosis, B. Cavernous sinus thrombosis, C. Retinoblastoma, D. Pseudotumers', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Most common cause of either bilateral or unilateral proptosis in adults is thyroid ophthalmopathy Refer khurana 6/e', 'role': 'assistant'}]