This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Bacterial infections, Subject name: Dental
[{'content': 'Treatment of choice for severe impetigo? \nSelect and explain. \nA. Incision and drainage of severe lesions, B. Systemic antibiotics, C. Topical antibiotics, D. Anti-septic dressing', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Treatment of choice for severe impetigo: systemic antibiotic for 7 to 10 days to prevent glomerulonephritis, a dangerous complication. Topical antibiotics are less effective than systemic antibiotics in treating impetigo.', 'role': 'assistant'}]