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
Tumor associated with polycythemia vera is - 
Select and explain. 
A. Sarcoma, B. Pitutary adenoma, C. Cerebellar haemangioblastoma, D. None of the above
C: Cerebellar haemangioblastoma
Answer: C: Cerebellar haemangioblastoma 
Explanation: None