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: Medicine
[{'content': 'Blast crisis in CML is indicated by all except -a) Lymphadenopathyb) High feverc) Sudden enlargement of spleend) Bleeding tendencies \nSelect and explain. \nA. a, B. ac, C. ad, D. b', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]