7.有關penicillin G 用於治療成人早期梅毒(syphilis)的劑型與劑量,下列何者正確?
A.aqueous crystalline penicillin G,6 million units IV,single dose
B.aqueous crystalline penicillin G,2.4 million units IM,single dose
C.benzathine penicillin G,12 million units IV,single dose
D.benzathine penicillin G,2.4 million units IM,single dose