This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Intra Ocular Tumour, Subject name: Ophthalmology
[{'content': 'The most common retrobulbar orbital mass in adults is - \nSelect and explain. \nA. Neurofibroma, B. meningioma, C. Cavernous haemangioma, D. Schwannoma', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. is 'c' i.e., Cavernous hemangioma Cavernous hemangioma is the commonest benign orbital tumour among adults.The tumour is usually located in the retrobulbar muscle cone.It presents as a slowly progressing unilateral proptosis in the 2nd to 4th decade.Sometimes it may compress the optic nerve without causing symptoms.", 'role': 'assistant'}]