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 strongest 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: A \nExplanation: The gamma phase is the strongest phase and for this reason it should occupy the maximum available space in the volume of the restoration.\nReference: Marzouk Operative dentistry, pg-106', 'role': 'assistant'}]