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
Composite bandage on tooth is to be required when the amount of remaining dentin thickness is: 
Select and explain. 
A. >2mm, B. 0.5-2mm, C. <0.5mm, D. All of the above.
B: 0.5-2mm
Answer: B: 0.5-2mm 
Explanation: When the remaining dentin thickness is 0.5-2mm then their is need to protect underlying dentinal tubules that is composite bandage on tooth.