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': 'Chemotherapy for Retinoblastoma is \nSelect and explain. \nA. Vincristine, Etoposide, Cisplatin, B. Vinblastine, Epirubicin, Cisplatin, C. Vincristine, Etopside, Cyclophosphamide, D. Vinblastine, Etoposide, Cisplatin', 'role': 'user'}, {'content': 'Answer: A \nExplanation: VEC regimen - Vincristine, Etoposide, Cisplatin.', 'role': 'assistant'}]