This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: G.I.T, Subject name: Medicine
[{'content': 'Splenectomy is most successful in - \nSelect and explain. \nA. Hereditary spherocytosis, B. Chronic myeloid leukemia, C. Idiopathic thrombocy topenic purpura, D. Aplastic anaemia', 'role': 'user'}, {'content': 'Answer: A \nExplanation: <p >Davidson&;s principles and practice of medicine 22nd edition. *in hereditary spherocytosis consideration is given to splenectomy ,which improves but does not normalised red cell survive.</p>', 'role': 'assistant'}]