<prompt> Bacitracin sensitivity is used to differentiate ?Group A Streptococcus from staphylococciGroup A streptococcus from other Beta hemolytic streptococciGroup A streptococcus from Gamma hemolytic streptococci.Group A streptococcus from Alpha hemolytic streptococci  <response>: Ans. is b i.e., Group A streptococcus from other Beta hemolytic streptococci The bacitracin susceptibility test is used to distinguish Group A streptococci, from other streptococci. This test is used to determine the effect of small amount of bacitracin 0.04U on an organism. 