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': 'Group A hemolytic pharyngitis is due to? \nSelect and explain. \nA. Local infection, B. Systemic toxicity, C. Invasion of mucosa, D. Local toxins', 'role': 'user'}, {'content': "Answer: A \nExplanation: Local infection REF: Jawett's 24th edition, chapter 15 Classification of streptococcal infections: Diseases Attributable to Invasion by S pyogenes, Hemolytic Group A Streptococci Erysipelas Cellulitis Necrotizing Fasciitis (Streptococcal Gangrene) Puerperal Fever Bacteremia/Sepsis Diseases Attributable to Local Infection with S pyogenes and Their By-Products: Streptococcal Sore Throat (Pharyngitis) Streptococcal Pyoderma Invasive Group A Streptococcal Infection: Streptococcal Toxic Shock Syndrome Scarlet Fever Post streptococcal Diseases: Rheumatic Fever Glomerulonephritis", 'role': 'assistant'}]