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
Thickness of thick cement liners : 
Select and explain. 
A. 1-25 micron, B. 25-50 micron, C. 50-100 micron, D. None
C: 50-100 micron
Answer: C: 50-100 micron 
Explanation: The thickness of thick cement liners ranges from 50 to 100 microns.