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': 'The commonly used root canal irrigant, which was used for irrigation wounds during world war 1 by Dakin is \nSelect and explain. \nA. Saline, B. Hydrogen peroxide, C. Buffered sodium hypochlorite, D. Distilled water', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]