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': 'With the increase in age keratinisation of gingiva \nSelect and explain. \nA. Increases, B. Decreases, C. Remains the same, D. Increases and then decreases', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]