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 mammals independent and tough suspension for teeth is provided by \nSelect and explain. \nA. Alveolar sockets, B. Cementum, C. Gubernacular cords, D. Periodontal membrane', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]