Statins,used as blood cholesterol-lowering agents,are extracted from:

Select the correct match:

Rennin used in the cheese industry is

Which of the following organisms is responsible for the production of the antibiotic $Penicillin$?

Assertion $A$: Cyclosporin-$A$ is used in organ transplantation of patients.
Reason $R$: It reduces the cholesterol level in the blood.
Which option is correct for Assertion $A$ and Reason $R$?

Vitamin $B_{12}$ is produced directly during the course of fermentation by