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': 'Persistent marrow aplasia is caused by which hepatitis virus: September 2006 \nSelect and explain. \nA. HAV, B. HBV, C. HCV, D. None of the above', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ans. D: None of the abovePersistent marrow aplasia appear after a variety of viral infections, most commonly viral hepatitis of the non-A, non-B, non-C, non-G type, which is associated with 5% to 10% of cases.', 'role': 'assistant'}]