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: Pediatrics
[{'content': '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 Hb–3.8 mg%; MCV–58 fl; MCH–19.4 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 diagnosis – \nSelect and explain. \nA. Iron deficiency anemia, B. Acute lymphoblastic anemia, C. Hemoglobin D disease, D. Hereditary spherocytosis', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]