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': 'Occlusal view of upper canine is \nSelect and explain. \nA. Diamond as angles are accentuated, B. Diamond as angles are decreased, C. Ovoid as angles are rounded, D. Rhomboid as angles are accentuated', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]