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
Periodontal fibres joining cemental surface of one tooth, to cemental surface of adjacent tooth are called: 
Select and explain. 
A. Gingivodental, B. Cemental fibres, C. Horizontal fibres, D. Transseptal fibres
D: Transseptal fibres
Answer: D: Transseptal fibres 
Explanation: None