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
Hollow ground bevel is? 
Select and explain. 
A. Knife edge, B. Exaggerated chamfer, C. Shoulder, D. Shoulder with bevel
B: Exaggerated chamfer
Answer: B: Exaggerated chamfer 
Explanation: Hollow ground (concave) bevel:

Used when  cusp required to cover with cast metal
Prepared with 12 fluted round ended bur
Provide sufficient bulk of restoration at cavosurface margin
It is an exaggerated chamfer basically
Also known as concave bevel
In posterior ceramic restorations at cavosurface angle hollow-ground chamfer confined to the marginal enamel will aid in developing a more effective seal