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 β-hemolytic streptococcal infection of the pharynx may be followed in some by: \nSelect and explain. \nA. Diphtheria, B. Typhoid fever, C. Rheumatic fever, D. Syphilis', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]