The most common substrate used in distilleries for the production of ethanol is

Which of the following options represents the correct matching for the given lists?

List-$I$	List-$II$
$(p)$ $Clostridium$ $butylicum$	$(i)$ Vitamins
$(q)$ $Rhizopus$ $nigricans$	$(ii)$ Sterins
$(r)$ $Ashbya$ $gossypii$	$(iii)$ Steroids
$(s)$ $Monascus$ $purpureus$	$(iv)$ Butyric acid

$A$: 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.

Match List-$I$ with List-$II$:

List-$I$	List-$II$
$(a)$ Aspergillus niger	$(i)$ Acetic Acid
$(b)$ Acetobacter aceti	$(ii)$ Lactic Acid
$(c)$ Clostridium butylicum	$(iii)$ Citric Acid
$(d)$ Lactobacillus	$(iv)$ Butyric Acid

Choose the correct answer from the options given below:

Which of the following microorganisms is used in the industry for the production of citric acid?

Which of the following enzymes are used to clarify fruit juices?
$(i)$ Lipase
(ii) Protease
(iii) RNase
(iv) Pectinase