What was the First Substance Produced by Microorganisms to Be

Question

What was the first substance produced by microorganisms to be used pharmaceutically?
A) penicillin
B) streptokinase
C) taxol
D) human insulin
E) interferons

Accepted Answer

Penicillin was the first substance produced by microorganisms (specifically, the fungus Penicillium) to be used as a pharmaceutical agent.