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: Medicine
Aplastic anemia in sickle cell anemia is due to infection of - 
Select and explain. 
A. Herpes, B. Parvovirus B19, C. CMV, D. Papova
B: Parvovirus B19
Answer: B: Parvovirus B19 
Explanation: None