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
Which of the following is false about disadvantage of Sod hypochlorite 
Select and explain. 
A. Cannot remove smear layer alone, B. Precipitates on combination with chlorhexidine, C. Should not be used in acute pulpal abscess, D. None of the above
D: None of the above
Answer: D: None of the above 
Explanation: None