Polycythaemia is caused by

A. True A fall in the O2 content of arterial blood stimulates production of erythropoietin.

B. True This also reduces the oxygen content of arterial blood.

C. False Anaemia is common in chronic renal failure due to damage to the erythropoietinproducing cells.

D. False The increase in plasma volume causes a fall in red cell count.

E. False This prevents megaloblastic anaemia but does not raise red cell concentration above normal.