What is the importance of bacteria?

Which of the following pairs is mismatched?

Select the correct match for $X$ and $Y$:

Column $X$	Column $Y$
$(1)$ Silage	$(P)$ Measure of water pollution level
$(2)$ Flocs	$(Q)$ Cattle feed
$(3)$ Biogas	$(R)$ Bacteria associated with fungal filaments
$(4)$ $BOD$	$(S)$ Anaerobic metabolism of organic waste

Identify the odd group out.

Match the following columns:

Column-$I$	Column-$II$
$(a)$ Distillation	$(1)$ Rhizobium
$(b)$ Non-distillation	$(2)$ Azotobacter
$(c)$ Symbiotic	$(3)$ Beer and Wine
$(d)$ Free-living	$(4)$ Whisky,Brandy,Rum

Consider the following statements:
$I.$ Yeast used in making bread and beverages is a prokaryotic fungus.
$II.$ Streptokinase is produced by $Streptococcus$ and modified by genetic engineering is used as a clot buster.
$III.$ Lipases are added in detergent for removing only stains from laundry.
$IV.$ Pectinases are used in clearing fruit juices.
Which of the statements given above are correct?