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 commonest malignant tumor of the orbit in the 1st decade is – \nSelect and explain. \nA. Retinoblastoma, B. Neuroblastoma, C. Rhabdomyosarcoma, D. Chloroma', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Most common malignant orbital tumor in children is rhabdomyosarcoma. It is seen in first decade of life.', 'role': 'assistant'}]