This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Tumors, Subject name: Ophthalmology
[{'content': 'The most common retrobulbar orbital mass in adults - \nSelect and explain. \nA. Nerurofibroma, B. Meningioma, C. Cavernous haemangioma, D. Schwannoma', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Commonest benign orbital tumor among adults with female preponderance(70%) ,is located in the retrobulbar muscle cone Ref: ak khurana 6th edition', 'role': 'assistant'}]