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': 'Most common leukemia in down syndrome? \nSelect and explain. \nA. AMC, B. ALL, C. CLL, D. CML', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Acute lymphoblastic leukemia is the most common leukemia in patients with down syndrome.', 'role': 'assistant'}]