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
For approximate how much time the 4% buffered glutaraldehyde is applied over the pulp stump during pulpotomy? 
Select and explain. 
A. 10 Sec., B. 60 Sec., C. 2 min, D. 4 min
D: 4 min
Answer: D: 4 min 
Explanation: None