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
ADA number 33½ stands for which bur design? 
Select and explain. 
A. Round, B. Inverted cone, C. Tapered fissure, D. Pear
B: Inverted cone
Answer: B: Inverted cone 
Explanation: Names and Key Dimensions of Recommended Burs