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': 'Which of the following conditions is most likely to lead to a dry tap during bone marrow aspiration ? \nSelect and explain. \nA. Acute lymphoblastic leukemia, B. Multiple myeloma, C. Megaloblastic anaemia, D. Idiopathic myelofibrosis', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. is 'd' i.e., Idiopathic myelofibrosis", 'role': 'assistant'}]