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': 'Sloglass is used in: \nSelect and explain. \nA. Root biomodification, B. Resective osseous surgery, C. Regeneration osseous surgery, D. Mucogingival surgery', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]