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
[{'content': 'CAMP test is positive for? \nSelect and explain. \nA. Group A streptococcus, B. Group B streptococcus, C. Group C streptococcus, D. Group D streptococcus', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Group B streptococcus", 'role': 'assistant'}]