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 one of the following is not an objective of trituration? \nSelect and explain. \nA. Remove oxides from powder particle surface, B. Keep the amount of gamma-1 or gamma-2 matrix crystals to maximum, C. Pulverize pellets into particles to aid in attack by mercury, D. Achieve a workable mass of amalgam in minimum time', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]