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: Pathology
[{'content': 'The Tumor causing Polycythemia due to erythropoietin production is: \nSelect and explain. \nA. Cerebellar hemangioma, B. Medulloblastoma, C. Ependymoma, D. Oligodendroglioma', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Cerebellar hemangioma', 'role': 'assistant'}]