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
Size of microfilled composite ranges from: 
Select and explain. 
A. 0.1-1micron, B. 0.01-0.1 micron, C. 0.001-0.01 micron, D. 0.005-0.02 micron
B: 0.01-0.1 micron
Answer: B: 0.01-0.1 micron 
Explanation: Microfilled composites are agglomerates of 0.01- to 0.1-µm inorganic colloidal silica particles embedded in 5- to 50-µm resin filler particles.
Classification of Reinforcing Filler Particles by Size Range