This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General pathology, Subject name: Pathology
[{'content': 'All are growth promoting oncogenes except - \nSelect and explain. \nA. FGF, B. TGF-a, C. TGF-b, D. PDGF', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Robbins basic pathology 9th edition page no 187 TGF b can function to prevent or promote tumor growth, depending on the state of other genes in the cell.', 'role': 'assistant'}]