Definition: In this task, you are given a multiple-choice question about healthcare. Answer the question based on your information and classify your answers into '1', '2', '3', and '4'.
Input: Question: A 58-year-old patient diagnosed with chronic myeloid leukemia. The most indicated treatment would be: 
 Options:  <1> Interferon. <2> Hydroxyurea <3> Imatinib. <4> Rituximab <5> Busulfan.
