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
Tumours most common to cause early papilledema arise from: 
Select and explain. 
A. Cerebellum, B. Mid brain, C. Parieto-occipital region, D. All of the above
D: All of the above
Answer: D: All of the above 
Explanation: Ans. All of the above