This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Medicine
A 29-year-old woman was found to have a hemoglobin of 7.8 g/dl. with a reticulocyte count of 0.8%. The peripheral 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 – 
Select and explain. 
A. Iron deficiency anemia, B. Beta-thalassemia minor, C. Sideroblastic anemia, D. Anemia due to chronic infection
A: Iron deficiency anemia
Answer: A: Iron deficiency anemia 
Explanation: None