<prompt> Drug of choice in chronic myeloid leukemia:ImitanibMesylateFludarabineCladribinePentostatin  <response>: Ans.a Imatinib mesylateRef: Harrison 19th ed. 102e-3 Imatinib mesylate is an inhibitor of tyrosine kinase which is used for treatment of the following cancers Chronic myeloid leukemia Gastro-intestinal stromal tumors Systemic mastocytosis 