The occlusal surface of a primary mandibular first molar often has a prominent faciolingual ridge. This transverse ridge connects which two cusps?: (A) Buccal and distolingual., (B) Mesiolingual and distobuccal., (C) Mesiobuccal and mesiolingual., (D) Distobuccal and distolingual.
Answer is C. Transverse ridge connecting MB and ML cusps.