Microbiology Streptococci 51c8ad7f Causative agent of acute rheumatic fever - A Group 'A' b-hemolytic streptococcus B Group-B b-hemolytic streptococcus C Group-C b-hemolytic streptococcus D Group-D b-hemolytic streptococcus High-Yield Explanation Ans. is 'a' i.e., Group 'A' p-hemolytic streptococcus o Acute rheumatic fever is caused by streptococcus pyogenes - group-A Beta hemolytic streptococcus.