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: Pathology
Which among the following is false 
Select and explain. 
A. A, B. B, C. C, D. D
B: B
Answer: B: B 
Explanation: In polycythemia vera RBC mass is high as a result of negative feedback erythropoeitin levels should be less.