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': 'One year old baby exclusively breast fed has a lcm. hepatomegaly severe pallor and no spleen.The most impoant investigation is - \nSelect and explain. \nA. B12 estimation, B. Serum iron estimation, C. Folic and estimation, D. Fetal hemoglobin estimation', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Serum iron estimation o By the age of 6 months the breast-fed infant's diet should be supplemented with iron foified complementary foods because iron in breast milk is sufficient upto the age of 6 months. o The baby in question has been exclusively breast fed upto 1 year, so he has developed iron deficiency anemia.", 'role': 'assistant'}]