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
GNAQ mutations are seen in 
Select and explain. 
A. Malignant melanoma, B. UVeal melanoma, C. Medullo epithelioma, D. All the above
B: UVeal melanoma
Answer: B: UVeal melanoma 
Explanation: Mutations in GNAQ, the gene encoding an alpha subunit of heterotrimeric G proteins, are found in 40% of uveal melanomas.