<prompt> Dryopithecus pattern is the characteristic feature of:Permanent mandibular 1st molar.Permanent mandibular 3rd molar.Permanent maxillary 2nd molar.Permanent maxillary canine.  <response>: In a mandibular first molar mesiolingual cusp joins the distobuccal cusp along the floor of the central fossa, this is known as dryopethicus pattern. 