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
A thicker rubber dam is recommended for……………cavity 
Select and explain. 
A. Class 1, B. Class 2, C. Class 4, D. Class 5
D: Class 5
Answer: D: Class 5 
Explanation: A thicker dam is more effective in retracting tissue and more resistant to tearing; it is especially recommended for isolating Class V lesions in conjunction with a cervical retainer