<prompt> True about iron deficiency anemia -Microcytic hypochromic anemiaDecreased TIBCIncreased ferritinBone marrow iron decreased earlier than serum iron  <response>: In iron deficiency anemia , the red cells in the blood film are hypochromic microcytic.Hyppochromia is due to poor filling of RBC with hemoglobin so that there is increased central pallor.TIBC is high and rises to give less than 10 saturation in iron deficiency anemia .Also serum ferritin is very low indicating poor tissue iron stores.Serum iron level will be low when serum iron falls below 15 microgramdecilitre , marrow stores are absent.Reference : Harsh mohan textbook of pathology sixth edition pg no 300 