<prompt> Vitamin B12 and folic acid supplementation in megaloblastic anemia leads to the improvement of anemia due to :Increased DNA synthesis in bone marrowIncreased Hemoglobin productionErythroid hyperplasiaIncreased iron absorption  <response>: A i.e. Increased DNA synthesis in bone marrowCobalt containing Vitamin B12 is found only in food of animal origin and is absorbed from distal ileumQ. B12 folic acid supplements treat pernicious megaloblastic anemia by increasing DNA synthesis in bone marrowQ. 