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': 'A community suffering from dry mouth condition is likely to have \nSelect and explain. \nA. Increased incidence of dental caries, B. Decreased incidence of dental caries, C. Increased incidence of crack tooth syndrome, D. Decreased incidence of crack tooth syndrome', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]