This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Blood, Subject name: Medicine
[{'content': 'Splenectomy is indicated in: \nSelect and explain. \nA. Sickle cell anaemia, B. Hereditary spherocytosis, C. Haemoglobin c disease, D. Hodgkins lymphoma', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans: b', 'role': 'assistant'}]