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
[{'content': 'The amalgam mixes should be discarded after? \nSelect and explain. \nA. 3.5 minutes, B. 2.5 minutes, C. 1.5 minutes, D. 2 minutes', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Amalgam mixes should be discarded after 3.5 minutes. It may enhance microleakage and diminished retention of the restoration will result.\nReference: Marzouk Operative dentistry, pg-113,114', 'role': 'assistant'}]