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
Caridex remains stable for how much time after mixing its constituents ? 
Select and explain. 
A. 20 minutes, B. 30 minutes, C. 60 minutes, D. 120 minutes
C: 60 minutes
Answer: C: 60 minutes 
Explanation: Chemical softening of carious dentin gentle excavation (Caridex and Carisolv)