This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General pathology, Subject name: Pathology
Which is not seen in polycythemia vera 
Select and explain. 
A. Increased Vit B12 binding capacity, B. Increased erythropoietin level, C. Increase RBC count, D. Ocular congestion
B: Increased erythropoietin level
Answer: B: Increased erythropoietin level 
Explanation: Harshmohan textbook of pathology 7th edition. *in PV unlike secondary polycythemia erythropoetin level in urine and serum is reduced.