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
Most common intraocular tumour in adult: 
Select and explain. 
A. Metastasis, B. Retinoblastoma, C. Malignant melanoma, D. Vitreous tumour
A: Metastasis
Answer: A: Metastasis 
Explanation: A i.e. Metastasis