This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Bacteria, Subject name: Microbiology
Catalase test is used to differentiate - 
Select and explain. 
A. Staphylococcus aureus from staphylococcus epidermidis, B. Staphylococci from streptococci, C. Streptococcus pyogenes from other streptococci, D. None of the above
B: Staphylococci from streptococci
Answer: B: Staphylococci from streptococci 
Explanation: Ans. is 'b' i.e., Staphylococci from streptococci