An "International Unit" of penicillin activity established in 1944 is amount of penicillin
equivalent to
A.0.6 micrograms of crystalline penicillin G of about 98% purity
B.0.6 micrograms of crystalline penicillin F of about 98% purity
C.0.8 micrograms of crystalline penicillin G of about 98% purity
D.0.8 micrograms of crystalline penicillin G of about 90% purity
equivalent to
A.0.6 micrograms of crystalline penicillin G of about 98% purity
B.0.6 micrograms of crystalline penicillin F of about 98% purity
C.0.8 micrograms of crystalline penicillin G of about 98% purity
D.0.8 micrograms of crystalline penicillin G of about 90% purity