Which of the following is used as an immunosuppressive agent?

Read the following statement having two blanks $(A$ and $B)$:
$A$ drug used for $A$ patients is obtained from a species of the organism $B$. It helps in clearing blood clots inside the blood vessels.
The one correct option for the two blanks is:

Which of the following is used to lower blood cholesterol levels?

Which type of fatty acid is produced by the bacterium $Clostridium$ $butyricum$?

How do bioactive molecules of fungal origin help in restoring good health of humans?

$A$: Fermentation stops when the alcohol concentration in a sugar solution reaches about $13 \%$.
$R$: $Saccharomyces \ cerevisiae$ are killed by the high concentration of alcohol,and zymase activity is inhibited.