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': 'What score would you assign this tooth according to the gingival and periodontal component of the Periodontal Disease Index? \nSelect and explain. \nA. 3, B. 4, C. 5, D. 6', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]