Dental 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. 💡 Explanation The occlusal surface of a primary mandibular first molar often has a prominent faciolingual ridge. This transverse ridge connects which two cusps? ✓ Correct Answer: C. Mesiobuccal and mesiolingual.