The occlusal surface of a primary mandibular first molar often has a prominent faciolingual ridge. This transverse ridge connects which two cusps?
Transverse ridge connecting MB and ML cusps.
Buccal and distolingual.
Mesiolingual and distobuccal.
Mesiobuccal and mesiolingual.
Distobuccal and distolingual.
Mesiobuccal and mesiolingual.