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 primary cause of intraocular tumor in children - \nSelect and explain. \nA. Retinoblastoma, B. Rhabdomyosarcoma, C. Neuroblastoma, D. Melanoma', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Malignant tumor arising from the neurosensory cells of retina due to deletion of RB gene located on the long arm of chromosome 13(13q14). Ref: ak khurana 6th edition', 'role': 'assistant'}]