<prompt> Which is not seen in polycythemia vera :Increased vitamin B12 binding capacityIncrease erythropoietin levelIncrease RBC countOcular congestion  <response>: Ans. is b increased erythropoietin level. In polycythemia Vera increase in erythrocytes occur without any increase in level of erythropoietin. In fact erythropoietin level is decreased due to feedback by increased erythrocytes. 