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
[{'content': 'Staphylococcus differs from streptococcus by: \nSelect and explain. \nA. Coagulase test, B. Catalase test, C. Phosphatase, D. Gram negative', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Catalase test(Ref: Ananthanarayan, 9th/e, p. 200 and 8th/e, p. 196)* Coagulase test is used to differentiate the different species of staphylococci (staph, aureus, staph, epidermidis).* Catalase test is used to differentiate staphylococci from streptococci.* Coagulase test cannot be used to differentiate streptococci from staphylococci because certain species of staphylococci are coagulase negative (coagulase negative staphylococci) as streptococci.", 'role': 'assistant'}]