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': 'Xylitol is a low caloric sweetener inhibits the growth of \nSelect and explain. \nA. S.mutans, B. S.pyogens, C. Lactobacillus, D. Actinomycosis', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]