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': 'Pancytopenia with cellular marrow is seen in all except \nSelect and explain. \nA. Megaloblastic anemia, B. Myelodysplasia, C. Paroxysmal nocturnal hemoglobinuria, D. G6PD deficiency', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Pancytopenia with cellular marrow is seen in\n\nMegaloblastic anemia\nMyelodysplasia\nParoxysmal nocturnal hemoglobinuria', 'role': 'assistant'}]