From which bacteria is streptokinase obtained?

Match the following columns.

Column $I$	Column $II$
$1$. $Streptococcus$ $pneumoniae$	$(A)$ acetic acid
$2$. $Aspergillus$ $niger$	$(B)$ butyric acid
$3$. $Clostridium$ $butyricum$	$(C)$ streptokinase
$4$. $Acetobacter$ $aceti$	$(D)$ citric acid

Saccharomyces cerevisiae yeast is used in the production of which of the following?

Assertion $(A)$: The statin produced by the yeast $Monascus$ $purpureus$ lowers blood cholesterol.
Reason $(R)$: Statins act by competitively inhibiting the enzyme responsible for the synthesis of cholesterol.

Which of the following bacteria is used in the production of butyric acid?

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