<prompt> Megaloblastic anemia may be caused by all the following exceptLiver diseaseCopper deficiencyThiamine deficiencyOrotic aciduria  <response>: Ref Harrison 19 th ed pg 640 Table,;128-1 Causes of Megalobla stic Anemia Cobalamin deficiency or abnormalities of cobalamin metabolism Folate deficiency or abnormalities of folate metabolism Therapy with antifolate drugs e.g., methotrexate Independent of either cobalamin or folate deficiency and refractory to cobalamin and folate therapy: Some cases of acute myeloid leukemia, myelodysplasia Therapy with drugs interfering with synthesis of DNA e.g., cytosine arabinoside, hydroxyurea, 6-mercaptopurine, azidothymidine Orotic aciduria responds to uridine Thiamine-responsive 