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
Alginate at 20 degrees, the gel is formed in 
Select and explain. 
A. 3-4 mins., B. 6-8 mins., C. 15-16 mins., D. 1-2 min.
A: 3-4 mins.
Answer: A: 3-4 mins. 
Explanation: None