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
Polycythemia Vera is characterized by all, EXCEPT: 
Select and explain. 
A. Bleeding, B. Increased viscosity of blood, C. Splenomegaly, D. None of the above
A: Bleeding
Answer: A: Bleeding 
Explanation: None