Mechanism of action of imatinib in cml

Imatinib used in CML acts by

a) inhibiting Bcr/abl translocation via tyrosine kinase
b) Blocking the action of P-glycoprotein
c) Competitive inhibition of ATP binding site of ABL kinase
d) C-kit kinase inhibition

Correct answer : c) Competitive inhibition of ATP binding site of ABL kinase