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 introduced Sodium Hypochlorite(with concentration) in Endodontics \nSelect and explain. \nA. Melton (0.5% to 5%), B. Melton (1% to 5%), C. Coolidge (0.5% to 5%), D. Coolidge (0.5% to 2.5%)', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]