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': 'T4:T8  ratio in gingivitis is : \nSelect and explain. \nA. 3:01, B. 2:01, C. 1:01, D. 1:03', 'role': 'user'}, {'content': 'Answer: B \nExplanation: T4:T8 ratio in gingivitis is 2:1.', 'role': 'assistant'}]