This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Dental
[{'content': 'The occlusal surface of a primary mandibular first molar often has a prominent faciolingual ridge. This transverse ridge connects which two cusps? \nSelect and explain. \nA. Buccal and distolingual., B. Mesiolingual and distobuccal., C. Mesiobuccal and mesiolingual., D. Distobuccal and distolingual.', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Transverse ridge connecting MB and ML cusps.', 'role': 'assistant'}]