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
Cleaning of files in between of endodontic treatment is done by: 
Select and explain. 
A. Gauze soaked in hypochlorite solution, B. 15 seconds in glass bead sterilizer, C. 30 seconds in glass bead sterilizer, D. Chlorhexidine
A: Gauze soaked in hypochlorite solution
Answer: A: Gauze soaked in hypochlorite solution 
Explanation: None