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 mean setting time of MTA is \nSelect and explain. \nA. 135 +/- 5 min, B. 145+/- 5 min, C. 155+/-5 min, D. 165+/-5 minutes', 'role': 'user'}, {'content': 'Answer: D \nExplanation: The maen setting time of MTA is 165+/- 5 mins . GMTA exhibits significantly higher initial and final setting times than WMTA.', 'role': 'assistant'}]