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': 'Suprabony pockets are also known as \nSelect and explain. \nA. Infrabony, B. Intra-alveolar, C. Subcrestal, D. Supracrestal/Supra-alveolar', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]