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': 'The scoring given in periodontal index for gingivitis is \nSelect and explain. \nA. 1, B. 2, C. 4, D. 6', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]