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': 'Size of microfilled composite ranges from: \nSelect and explain. \nA. 0.1-1micron, B. 0.01-0.1 micron, C. 0.001-0.01 micron, D. 0.005-0.02 micron', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Microfilled composites are agglomerates of 0.01- to 0.1-µm inorganic colloidal silica particles embedded in 5- to 50-µm resin filler particles.\nClassification of Reinforcing Filler Particles by Size Range', 'role': 'assistant'}]