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
Which of the following has lowest filler loading ? 
Select and explain. 
A. Microfill composite, B. Traditional composite, C. Small particle filled composite, D. Hybrid composite
A: Microfill composite
Answer: A: Microfill composite 
Explanation: Because small particle filled composite has highest filler loading.
And higher filler loading increases the mechanical property of composite.