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
Which of the following fibre groups are NOT attached to
alveolar bone 
Select and explain. 
A. Transeptal, B. Oblique, C. Horizontal, D. Dentoperiosteal
A: Transeptal
Answer: A: Transeptal 
Explanation: None