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': 'All are medically important streptococci except - \nSelect and explain. \nA. Strep. pyogenes, B. Strep. agalactiae, C. Strep. equisimilis, D. Strep. salivarius', 'role': 'user'}, {'content': 'Answer: D \nExplanation: STREPTOCOCCI \n\nStreptococci are gram-positive, nonmotile, non-spore-forming, catalase & oxidase negative medically important bacteria.\nMany organisms of streptococcus genus cause human diseases.', 'role': 'assistant'}]