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: Medicine
All of the following tumors are malignant except - 
Select and explain. 
A. Glioma, B. Astrocytoma, C. Hemangioblastoma, D. Ependymoma
C: Hemangioblastoma
Answer: C: Hemangioblastoma 
Explanation: None