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': 'A child presents with sepsis. Bacteria isolated showed beta hemolysis on blood agar, resistance to bacitracin, and a positive CAMP test. The most probable organism causing infection is - \nSelect and explain. \nA. S. Pyogenes, B. S. Agalacitae, C. Enterococcus, D. S. Pneumoniae', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Points favoring to S. agalactiae:\n\nSepticemia in a child\nβ hemolysis on blood agar\nResistant to bacitracin and a positive CAMP test\n\nS. pyogenes: sensitive to bacitracin and CAMP test is negative.\nRef: Apurba Sastry’s Essentials of Medical Microbiology 1/e p229, Ananthanarayan 9/e p216, 8/e\xa0p207', 'role': 'assistant'}]