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': 'In centric occlusion, the cusp tip of the maxillary\ncanine is in alignment with which mandibular tooth: \nSelect and explain. \nA. Facial embrasure of canine and premolar, B. Incisal embrasure of canine and premolar, C. Distal ridge of the cusp of mandibular canine, D. Mesial ridge on the facial cusp of mandibular first premolar', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]