Polymyxin B is pharmacologically and microbilogically similar to.. Colistin - Coly- Mycin S

Polymyxin B is pharmacologically and microbilogically similar to:
A) Ampicillin (Polycillin)
B) Colistin (Coly- Mycin S)***
C) Gentamicin (Garamycin)
D) Penicillin G
E) Tetracycline (Achromycin).