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': 'In gingival index score 2 means: \nSelect and explain. \nA. Bleeding on slight provocation, B. Spontaneous bleeding, C. Colour change in gingiva, D. No change in gingiva', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]