This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Ophthalmology
[{'content': 'Most common intraorbital tumour in children is \nSelect and explain. \nA. Cavernous haemangioma, B. Rhabdomyosarcoma, C. Malignant melanoma, D. Retinoblastoma', 'role': 'user'}, {'content': 'Answer: B \nExplanation: M/c intraorbital tumour in adults - Cavernous hemangioma.\nM/c intraorbital tumour in children - Rhabdomyosarcoma.', 'role': 'assistant'}]