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': 'Following does not assist in locating Root canal Orifices? \nSelect and explain. \nA. H2O2, B. NaOCl, C. DG 16 endodontic probe, D. Dentinal Map', 'role': 'user'}, {'content': 'Answer: A \nExplanation: NaOCl is used in Champagne Bubble test. DG 16 is endodontic explorer', 'role': 'assistant'}]