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': 'Which is false regarding Gram positive cocci ? \nSelect and explain. \nA. Staph. saprophyticus causes UTI in females, B. Micrococci are oxidase positive, C. Most enterococci are sensitive to penicillin, D. Pneumococci are capsulated', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Unlike streptococci enterococci are not reliably killed by penicillin or ampicillin alone at concentration acheived clinically in the blood or tissues.\n\nAntimicrobial susceptibility testing should be performed routinely on enterococcal isolates.\n\nOther options\nOption ‘a’ • Staph. saprophyiticus specially causes UTI in sexually active young women.\nOption ‘b’ • Micrococci are catalase and oxidase positive Gr (+ve) cocci. They are strict aerobes and are non pathogenic.\n\nMicrococci are differentiated from Staphylococci by Hugh and deifson oxidation fermentation test in which micrococci shows oxidative pattern while staphylococci show fermentive pattern.', 'role': 'assistant'}]