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': 'Voex vein invasion is commonly seen in - \nSelect and explain. \nA. Retinoblastoma, B. Malignant melanoma, C. Optic nerve gliomas, D. Medullo- epitheliomas', 'role': 'user'}, {'content': 'Answer: B \nExplanation: *Voex vein involvement is seen in uveal malignant melanoma. Ref: Ophthalmic pathology : guide for clinicians p.253.', 'role': 'assistant'}]