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': 'Periodontal fibres joining cemental surface of one tooth, to cemental surface of adjacent tooth are called: \nSelect and explain. \nA. Gingivodental, B. Cemental fibres, C. Horizontal fibres, D. Transseptal fibres', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]