Statins are produced by which microorganism?

Which of the following is a bacterial product?

Which microorganism is used for the production of acetic acid?

Read the statement containing two blanks $A$ and $B$: The medicine used for patients of $A$ is obtained from an organism of the species $B$. Select the correct option to fill both blanks.

What is the function of $Rhizopus$ $nigricans$?

In $1928$,a scientist discovered the first effective antibiotic. Who was the scientist and what was the antibiotic?