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': 'Voex veins invasion is commonly seen in: March 2004 \nSelect and explain. \nA. Retinoblastoma, B. Malignant melanoma of the choroid, C. Optic nerve glioma, D. Medulla epitheloima', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. B i.e. Malignant melanoma of the choroid', 'role': 'assistant'}]