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
Die spacers are applied in several coats within…………………of the preparation line 
Select and explain. 
A. 0.3 mm, B. 0.5 mm, C. 1.5 mm, D. 1.0 mm
B: 0.5 mm
Answer: B: 0.5 mm 
Explanation: None