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
[{'content': 'Instrument used to plane buccoproximal and linguoproximal walls in class II cavity is: \nSelect and explain. \nA. Enamel hatchet, B. Bibeveled hatchet, C. Chisel, D. Single sided chisel', 'role': 'user'}, {'content': 'Answer: A \nExplanation: 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.', 'role': 'assistant'}]