According to Jones criteria for the diagnosis of rheumatic fever , which of the following is a major criteria:

Jones criteria for the diagnosis of rheumatic fever: a) Major manifestations: Carditis Polyarthritis (migratory and painful) Chorea (Sydenham's chorea Erythema marginatum Subcutaneous nodules over bones or tendons b) Minor manifestations: Fever Arthralgia Previous H/O rheumatic fever Raised ESR or C-reactive protein Leucocytosis First or second degree AV block c) PLUS Supporting evidence of preceding streptococcal infection like recent scarlet fever, raised anti Streptolysin 0 (ASO) positive throat culture.