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: Pharmacology
[{'content': 'Mechanism of action of imatinib mesylate is : \nSelect and explain. \nA. Increase in metabolism of P glycoprotein, B. Blocking the action of P glycoprotein, C. Blocks the action of chimeric fusion protein of bcr–abl, D. Non–competitive inhibition of ATP binding site', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]