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': 'For accurate replica production of intra and extraoral tissues, impression materal should be transform into a rubbery or rigid solid in the mouth within? \nSelect and explain. \nA. 2 minutes, B. 7 minutes, C. 10 minutes, D. 15 minutes', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]