GROUP A STREPTOCOCCI ARE DIFFERENTIATED FROM OTHER BETA-HAEMOLYTIC STREPTOCOCCI BY.. BACITRACIN

GROUP A STREPTOCOCCI ARE DIFFERENTIATED FROM OTHER BETA-HAEMOLYTIC STREPTOCOCCI BY:
DISC CONTAINING:
A- NEOMYCIN
B- OPTOCHIN
C- BACITRACIN***
D- NOVOBIOCIN.