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': 'Which of the following phase is virtually eliminated in high copper amalgam: \nSelect and explain. \nA. Gamma-I phase, B. Gamma-II phase, C. Beta phase, D. None', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]