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: Pathology
[{'content': 'Fibrosis is due to ? \nSelect and explain. \nA. TGF beta, B. TNF alpha, C. IL 7, D. IL l0', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., TGF beta", 'role': 'assistant'}]