This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Hemolytic Anemias: Basic concepts and classification, Subject name: Pathology
[{'content': 'Pure red cell aplasia is associated with: \nSelect and explain. \nA. Thymoma, B. Renal cell carcinoma, C. Hepatocellular carcinoma, D. Prostate carcinoma', 'role': 'user'}, {'content': 'Answer: A \nExplanation: -Pure red cell aplasia is a primary marrow disorder in which only erythroid progenitors are suppressed. -In severe cases, red cell progenitors are completely absent from the marrow. -It may occur in association with neoplasms, paicularly thymoma and large granular lymphocytic leukemia; drug exposures; autoimmune disorders & parvovirus infection.', 'role': 'assistant'}]