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 irrigant is used during opening of a tooth with acute pulpal abscess? 
Select and explain. 
A. Normal saline, B. Hydrogen peroxide, C. Sodium hypochlorite, D. EDTA
A: Normal saline
Answer: A: Normal saline 
Explanation: None