This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Blood, Subject name: Medicine
[{'content': 'Drug of choice for CML is? \nSelect and explain. \nA. Imatinib, B. Hydroxurea, C. Infliximab, D. IFN', 'role': 'user'}, {'content': 'Answer: A \nExplanation: ANSWER: (A) ImatinibREF: Harrison s 17th ed, CMDT 2008 p. 444The drug treatment of choice for CML when Allogenic SCT (stem cell therapy) is not feasible is IMATINIBIFN-tz used to be the drug treatment of choice for CML when IMATINIB was not available', 'role': 'assistant'}]