True statement about Rheumatic fever in children

Answer is A (Polyahritis ) Polyahritis is a major criteria for diagnosis of RF. Most common valve involved in Rheumatic carditis is mitral valve. Erythema marginatum is a rare manifestation (<3% of patients) and almost never involves the face. Acute Rheumatic fever is caused by Group A streptococcii and not alpha hemolytic streptococcii Features of Erythema Marginatum Erythema margination is rare (< 3% of patients with Acute Rheumatic fever) Erythema marginatum is charachteristic / classic rash of Acute Rheumatic fever (Rare but charachteristic) Typically occurs on the trunk or the proximal limbs (Never on the Face) Appears as ring that extends contrifigally (marginatum) while the skin in the centre of the ring returns to normal Rash is evanescent, pink to red co Rash is non pruiritic 0 Rash occurs commonly in assoication with carditis (usually occurs only in patients with carditis) Rash leaves no induration and no