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
What is the thickness of class II matrix band? 
Select and explain. 
A. 0.002 inches, B. 0.002 mm, C. 0.02 inches, D. 0.02 mm
A: 0.002 inches
Answer: A: 0.002 inches 
Explanation: There are two types of bands:

Uncontoured bands
Precontoured bands

Uncontoured bands
These are available in two thicknesses:

0.002 inch (0.05 mm)
0.0015 inch (0.038 mm)

Sturdevants operative dentistry south asian edition page 204