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 is the noblest phase in amalgam reaction? \nSelect and explain. \nA. Gamma phase, B. Gamma-1 phase, C. Gamma-2 phase, D. Mercury phase', 'role': 'user'}, {'content': 'Answer: B \nExplanation: The gamma-1 phase is the noblest phase and most resistant to tarnish and corrosion.\nReference: Marzouk Operative dentistry, pg-106', 'role': 'assistant'}]