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: Dental
[{'content': 'Who discovered stainless steel? \nSelect and explain. \nA. Adams C.P., B. Schwarz A.M., C. Brearley, D. Backofen W.A and Gales G.F', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]