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
Manual mulling is carried out for not more than 
Select and explain. 
A. 1-2 seconds, B. 2-4 seconds, C. 1-4 seconds, D. 2-5 seconds
D: 2-5 seconds
Answer: D: 2-5 seconds 
Explanation: In mulling, the mixture is enveloped in a dry piece of rubber dam and vigorously rubbed between the first finger and thumb. This process should not exceed 2-5 seconds.
Reference: Marzouk Operative dentistry, pg-113