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': 'GNAQ mutations are seen in \nSelect and explain. \nA. Malignant melanoma, B. UVeal melanoma, C. Medullo epithelioma, D. All the above', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Mutations in GNAQ, the gene encoding an alpha subunit of heterotrimeric G proteins, are found in 40% of uveal melanomas.', 'role': 'assistant'}]