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': 'Root canal is flooded with antiseptic so as to: \nSelect and explain. \nA. Prevent the removal of the shavings from the root canal, B. Where there is an absence of instrumentation, C. Prevent infection during instrumentation, D. Avoid instrumentation', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]