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
After removal of granulation tissue from periodontal
pocket the hard structure seen is 
Select and explain. 
A. Periosteum, B. Transseptal fibres, C. Sharpey's fibres, D. Organized granulation tissue
B: Transseptal fibres
Answer: B: Transseptal fibres 
Explanation: None