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': 'Gingival fiber group which inserts in two adjacent teeth \nSelect and explain. \nA. Horizontal, B. Circular, C. Transeptal, D. Oblique', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]