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': 'Commonest histological type of rhabdomyosarcoma of orbit is \nSelect and explain. \nA. Embryonal type, B. Alveolar type, C. Pleomorphic type, D. None of the above', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Embryonal RMS\n\nOccurs in children < 10 years of age.\nChr IIP involved.', 'role': 'assistant'}]