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': 'The most common malignant orbital tumor in children is – \nSelect and explain. \nA. Rhabdomyosarcoma, B. Cavernous Hemangioma, C. ALL, D. AML', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Most common malignant orbital tumor in children is rhabdomyosarcoma. It is seen in first decade of life.', 'role': 'assistant'}]