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
Example of excavator are all except: 
Select and explain. 
A. Hoe, B. Ordinary hatchet, C. Enamel hatchet, D. Angle former
C: Enamel hatchet
Answer: C: Enamel hatchet 
Explanation: The four subdivisions of excavators are

Ordinary hatchets
Hoes
Angle formers
Spoons

Chisels are intended primarily for cutting enamel and may be grouped as

Straight, slightly curved, or bin-angle
Enamel hatchets
Gingival margin trimmers

Sturdevants operative dentistry 7th edition page e4