<prompt> Which of the following is a major criteria for diagnosis of Rheumatic fever RF according to modified Jones criteria ?ASO titrePast history of Rheumatic feverFeverSubcutaneous nodules  <response>: Jones major criteria of RHD include card it is,chorea,ahritis, subcutaneous nodule, erythema marginatum. Ref : Ghai essential of pediatrics, eighth edition p.no:436, Davidson principal and practice of medicine, 21st edition, p.no:613 