A nine month old boy of Sindhi parents presented to you with complains of progressive lethargy, irritability and pallor since 6 month of age.Examination revealed severe pallor.Investigation showed Hb-3.8 mg%;MCV-58fi;MCH-19.4pg/cell.Blood film shows osmotic fragility is normal (target cells and normoblasts).X-ray skull shows expansion of erythroid marrow.Which of the following is the most likely diagnosis?

• A. Hemoglobin D disease
• B. Hereditary spherocytosis
• C. Iron deficiency anemia
• D. Acute lymphoblastic anemia