A 29 year old woman was found to have a hemoglobin of 7.8 g/dl.With a reticulocyte count of 0.8%.The peripherial blood smear showed microcytic hypochromic anemia.Hemoglobin A2 and hemoglobin F levels were 2.4% and 1.3% respectively.The serum iron and the total iron binding capacity were 15 micro g/dl,and 420 micro g/dl,respectively.The most likely cause of anemia is:

• A. Iron deficiency anemia
• B. Beta-thalassemia minor
• C. Sideroblastic anemia
• D. Anemia due to chronic infection