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 phase provides maximum strength in hardened mercury/silver alloy? \nSelect and explain. \nA. Silver / Mercury phase, B. Silver / Tin phase, C. Tin / Mercury phase, D. Zinc / Mercury phase', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]