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 girl presented with symptoms of pharyngitis. Group A hemolytic pharyngitis is due to? \nSelect and explain. \nA. Local infection, B. Hematogenous spread, C. Lymphatic spread, D. None of the above', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Local infection is the most common cause of inflammation of pharyngeal structures or acute pharyngitis. Group A beta-hemolytic streptococcus is a common causative organism in both pharyngitis and tonsillitis. Local infection and inflammation cause lymph node enlargement, swelling, erythema, and pain.', 'role': 'assistant'}]