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: Medicine
[{'content': 'For diagnosis of acute rheumatic fever, essential feature is \nSelect and explain. \nA. Prior history of rheumatic fever, B. Recent sore throat infection, C. 1 major and 2 minor criteria, D. Erythema marginatum', 'role': 'user'}, {'content': 'Answer: C \nExplanation: The diagnosis, according to the revised Jones criteria, is based upon two or more major manifestations, or one major and two or more minor manifestations; evidence of preceding streptococcal infection is also required.\nJONES CRITERIA FOR THE DIAGNOSIS OF RHEUMATIC FEVER\nMajor manifestations\n\nCarditis\nPolyathritis\nChorea\nErythema marginatum\nSubcutaneous nodules Minor manifestations\nFever\nArthralgia\nPrevious rheumatic fever\nRaised ESR or CRP\nLeucocytosis\nFirst – degree AV block PLUS\nSupporting evidence of preceding streptococcal infection: recent scarlet fever, raised antistreptolysin 0 or other streptococ-cal antibody titre, positive throat culture\n\nN. B. Evidence of recent streptococcal infection.', 'role': 'assistant'}]