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
Size of the bur for preparing lingual rest seat for an RPD 
Select and explain. 
A. 1/10th inch, B. 1/4th inch, C. 1/2 inch, D. 1 inch
B: 1/4th inch
Answer: B: 1/4th inch 
Explanation: None