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
The thickness of rubber dam for children 
Select and explain. 
A. 6 x 6", B. 3 x 3", C. 5 x 5", D. 8 x 8"
C: 5 x 5"
Answer: C: 5 x 5" 
Explanation: None