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: Microbiology
[{'content': 'Bacteria implicated in dental caries is: \nSelect and explain. \nA. Streptococcus mutans, B. Pneumococci, C. Streptococcus pyogenes, D. Staphylococcus aureus', 'role': 'user'}, {'content': 'Answer: A \nExplanation: S. mutans and Streptococcus sobrinus have a central role in the etiology of dental caries,\xa0because these can adhere to the enamel salivary pellicle and to other plaque bacteria.', 'role': 'assistant'}]