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
Imatinib primarily acts by inhibiting : 
Select and explain. 
A. BCR–ABL, B. Tyrosine Kinase, C. PGDFR, D. None
B: Tyrosine Kinase
Answer: B: Tyrosine Kinase 
Explanation: None