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
Root canal is flooded with antiseptic so as to: 
Select and explain. 
A. 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
C: Prevent infection during instrumentation
Answer: C: Prevent infection during instrumentation 
Explanation: None