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': 'Setting time of Mineral Trioxide Aggregate (MTA) is \nSelect and explain. \nA. 2-5 minutes, B. 5-8 minutes, C. 1 hour, 45 minutes, D. >2 to 3 hours', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]