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': 'Facial occlusal line in the maxillary arch is formed by \nSelect and explain. \nA. Stamp cusps, B. Centric holding cusps, C. Supporting cusps, D. Non-supporting cusps', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]