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
The amalgam mixes should be discarded after? 
Select and explain. 
A. 3.5 minutes, B. 2.5 minutes, C. 1.5 minutes, D. 2 minutes
A: 3.5 minutes
Answer: A: 3.5 minutes 
Explanation: Amalgam mixes should be discarded after 3.5 minutes. It may enhance microleakage and diminished retention of the restoration will result.
Reference: Marzouk Operative dentistry, pg-113,114