This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Orbit, Subject name: Ophthalmology
[{'content': 'Most common cause of unilateral proptosis in adults is - \nSelect and explain. \nA. Thyroid ophthalmopathy, B. Rhabdomyosarcoma, C. Orbital blow out fracture, D. Orbital cellulitis', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. is a i.e., Thyroid ophthalmopathy * The most common cause of unilateral proptosis in children is orbital cellulitis* The most common cause of unilateral proptosis in adults is thyroid ophthalmopathy.* Most common cause of bilateral proptosis in children ->> Neuroblastoma (me), Leukemia (Chloroma)* Most common cause of bilateral proptosis in adults is thyroid ophthalmopathy.', 'role': 'assistant'}]