which of the responses is (are) correct . Anaemia in cancer patients?

pharmacy

1     often develops insiduously

2     may be corrected with the use of erythropoietin

3     is always due to cancer chemotherapy

A    if 1, 2 and 3 are correct

B    if 1 and 2 only are correct

C    if 2 and 3 only are correct

D    if 1 only is correct

E    if 3 only is correct