<prompt> Instrument used to plane buccoproximal and linguoproximal walls in class II cavity is:Enamel hatchetBibeveled hatchetChiselSingle sided chisel  <response>: 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. 