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
Enucleation is done for: 
Select and explain. 
A. Retinoblastoma, B. Malignant melanoma, C. Glaucoma, D. Pthisis bulbi
B: Malignant melanoma
Answer: B: Malignant melanoma 
Explanation: B i.e. About 20 days