This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Chronic Lymphocytic Leukemia, Subject name: Pathology
[{'content': 'One of the following leukemia almost never develops after radiation? \nSelect and explain. \nA. Acute myeloblastic leukemia, B. Chronic myeloid leukemia, C. Acute lymphoblastic leukemia, D. Chronic lymphocytic leukemia', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Radiation is not an etiological factor for CLL.', 'role': 'assistant'}]