<prompt> Causative organism of rheumatic fever -Group A StreptococciStaphylococciGroup B StreptococciGroup D Streptococci  <response>: Ans. is a i.e., Group A Streptococci Rheumatic fevero Rheumatic fever RF is an acute, inununologically mediated, multisystem inflammatory disease classically occurring a few weeks after an episode of group A streptococcal pharyngitis; occasionally, RF can follow streptococcal infections at other sites, such as the skin. 