This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Hematology, Subject name: Pediatrics
[{'content': 'Which of the following has least on life expectancy since point of diagnosis ? \nSelect and explain. \nA. Chronic myeloid leukemia, B. Chronic lymphoid leukemia, C. Acute myeloid leukemia, D. Acute lymphoid leukemia', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Chronic myeloid leukemia (CML) have least life expectancy especially juvenile form compared to other leukemia. Reference: GHAI Essential pediatrics, 8th edition', 'role': 'assistant'}]