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
Instrument used to plane buccoproximal and linguoproximal walls in class II cavity is: 
Select and explain. 
A. Enamel hatchet, B. Bibeveled hatchet, C. Chisel, D. Single sided chisel
A: Enamel hatchet
Answer: A: Enamel hatchet 
Explanation: With the enamel hatchet or the bin-angle chisel or both, the dentist can cleave away any remaining undermined proximal enamel, establishing the proper direction to the mesiolingual and mesiofacial walls.