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
Staphylococcus differes from streptococcus by - 
Select and explain. 
A. Coagulase test, B. Catalase test, C. Phasphatase, D. Gram negative
B: Catalase test
Answer: B: Catalase test 
Explanation: Ans. is 'b' i.e., Catalase test * Coagulase test is used to differentiate the different species of staphylococci (staph aureus, staph, epidermidis).* Catalase test is used to differentiate staphylococci from streptococci.