Bottled fruit juices bought from the market are clarified by using:

Citric acid is produced by

Match the following columns and select the correct option.

Column-$I$	Column-$II$
$(a)$ Clostridium butylicum	$(i)$ Cyclosporin-$A$
$(b)$ Trichoderma polysporum	$(ii)$ Butyric Acid
$(c)$ Monascus purpureus	$(iii)$ Citric Acid
$(d)$ Aspergillus niger	$(iv)$ Blood cholesterol lowering agent

$(a)\quad(b)\quad(c)\quad(d)$

Match the following and select the correct option:

$I$. Citric acid	$A$. Lactobacillus
$II$. Acetic acid	$B$. Acetobacter aceti
$III$. Butyric acid	$C$. Aspergillus niger
$IV$. Lactic acid	$D$. Clostridium butylicum

Which industrial products are synthesized from microbes?
$I.$ Antibiotics
$II.$ Fermented beverages
$III.$ Bioactive molecules
$IV.$ Enzymes
Choose the correct option.

The large holes in Swiss cheese are due to the production of a large amount of $A$ by a bacterium $B$. Here $A$ and $B$ refer to: