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': 'Treatment of metastatic disease in retinobastoma - \nSelect and explain. \nA. Chemotherapy, B. Enucleation, C. Radiotherapy, D. Cryo', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Standard dose CVE regimen for group A B &C patients : 3 weekly 6 cycles of carboplastin on day 1 , vincristine on day 1 & etoposide on day 1 & 2. High dose CVE regimen for group D: 3 weekly 6-12 cycles of the same . Ref : ak khurana 6th edition', 'role': 'assistant'}]