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
Which of the following is the most useful to differentiate micrococci from Staphylococci- 
Select and explain. 
A. Catalase test, B. Hugh Leifson test, C. Oxidase test, D. All of the above
B: Hugh Leifson test
Answer: B: Hugh Leifson test 
Explanation: Ans. is 'b' i.e., Hugh Leifson test . The common laboratory test to differentiate between micrococci and Staphylococci is Hugh and Leifson's oxidation fermentation test in which micrococci show oxidative and Staphylococci show fermentative patterns.