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': 'Drug of choice for treatment of CML is: \nSelect and explain. \nA. Imatinib, B. Hydroxyurea, C. IFN-Alfa, D. Infliximab', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Answer is A (Imatinib) The drug of choice for drug treatment of CML is Imatinib mesylate.', 'role': 'assistant'}]