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 acts on: 
Select and explain. 
A. NMYC, B. Tyrosine kinase, C. PDGF, D. VEGF
B: Tyrosine kinase
Answer: B: Tyrosine kinase 
Explanation: Tyrosine kinase