<prompt>  A nine month old boy of Sindhi parents presented to you with complaints of pregressive lethargy, irritability pallor since 6 months of age. Examination revealed severe pallor. Investigation showed Hb3.8 mg; MCV58 fl; MCH19.4 pg cell.hood film shows osmotic fragility is normal target cells normoblasts. X-ray skull shows expansion of erythroid marrow. Which of the following is the most likely diagnosisIron deficiency anemiaAcute lymphoblastic anemiaHemoglobin D diseaseHereditary spherocytosis 