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': 'Imatinib acts on: \nSelect and explain. \nA. NMYC, B. Tyrosine kinase, C. PDGF, D. VEGF', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Tyrosine kinase', 'role': 'assistant'}]