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': "After removal of granulation tissue from periodontal\npocket the hard structure seen is \nSelect and explain. \nA. Periosteum, B. Transseptal fibres, C. Sharpey's fibres, D. Organized granulation tissue", 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]