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
False about the precipitate formed as a result of reaction of chlorhexidine and NaOCl 
Select and explain. 
A. Interferes with seal of obturation, B. Causes cyanosis, C. To prevent rinse canal with absolute alchohol, D. NaOCl is always used as final rinse
D: NaOCl is always used as final rinse
Answer: D: NaOCl is always used as final rinse 
Explanation: None