streptomycin is produced by

1. streptomyces venezuelae
2. streptomyces griseus
3. streptomyces erythreus
4. streptomyces aureofaciens

The correct option is 2.
Streptomycin is an antibiotic (antimycobacterial) drug, the first of a class of drugs called aminoglycosides to be discovered, and it was the first cure for tuberculosis. It is derived from the actinobacterium Streptomyces griseus. Streptomycin is a bactericidal antibiotic.Adverse effects of this medicine are ototoxicity, nephrotoxicity, fetal auditory toxicity, and neuromuscular paralysis.