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': 'A 50 years old male presents with massive splenomegaly. His differential diagnosis will include all, except \nSelect and explain. \nA. Chronic mycloid leukemia, B. Polycythemia rubra vera, C. Hairy cell leukemia, D. Aplastic anemia', 'role': 'user'}, {'content': "Answer: D \nExplanation: Diseases Associated with massive splenmegaly.\n\n\n\nChronic myclogenous leukemia\nGaucher's disease\n\n\nLymphomas\nChronic lymphocytic leukemia\n\n\nHairy cell leukemia\nSarcoidosis\n\n\nMyelofibrosis with myeloid metaplasia\nAutoimmune hemolytic anemia\n\n\nPolycythemia vera\nDiffuse splenic human giomatosis", 'role': 'assistant'}]