This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Microbiology
[{'content': 'Which of the following is most useful to differentiate micrococci from staphylococci? \nSelect and explain. \nA. Catalase test, B. Hugh-Leifson test, C. Coagulase test, D. All of the above', 'role': 'user'}, {'content': "Answer: B \nExplanation: The common lab test used to differentiate between micrococci and staphylococci is Hugh and Leifson's oxidation fermentation test in which micrococci show oxidative and staphylococci chow fermentative patterns. Both are members of the family Micrococaceae and both are catalase positive. Coagulase test differentiates between Staph. aureus and other coagulase-negative Staphylococci.", 'role': 'assistant'}]