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: Surgery
[{'content': 'Splenectomy is useful in: September 2008 \nSelect and explain. \nA. Hemophilia, B. Polycythemia, C. Hereditary Spherocytosis, D. Thalassemia', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ans. C: Hereditary Spherocytosis', 'role': 'assistant'}]