Which one of the following pairs is wrongly matched?

Which of the following pairs is not correctly matched?

$A$ - Aspergillus niger is a bacterium.
$R$ - Lactobacillus is a fungi.

Match the following columns:

Column-$I$	Column-$II$
$(a)$ Flocs	$(1)$ Biocontrol agent
$(b)$ Methanobacterium	$(2)$ Biological treatment
$(c)$ Ladybird	$(3)$ Biofertilizer
$(d)$ Cyanobacteria	$(4)$ Biogas production

Statement $A$: Hydrogen is a fuel of energy.
Statement $R$: Photosynthetic microorganisms produce $H_2$,which are capable of converting solar energy into chemical energy.

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