Which of the following bacteria is associated with nitrogen fixation?

Match the following and choose the correct combination from the options given.

Column $I$	Column $II$
$a.$ Potassium	$(i)$ Germination of pollen grains
$b.$ Molybdenum	$(ii)$ Involved in synthesis of auxin
$c.$ Boron	$(iii)$ Involved in stomatal movement
$d.$ Zinc	$(iv)$ Constituent of ferredoxin
$e.$ Sulphur	$(v)$ Component of nitrate reductase

Select the incorrect statement from the following options.

Match the following columns correctly:

Column $I$	Column $II$
$(a)$ Boron	$(p)$ For $CO_2$ transport
$(b)$ Copper	$(q)$ Essential for nitrogen fixation
$(c)$ Molybdenum	$(r)$ Essential for sugar translocation in plants
$(d)$ Chlorine	$(s)$ Essential for chlorophyll synthesis in plants

Identify the mismatched pair.

Select the correct option:
$(1)$ During $transamination$ / $reductive$ $amination$,an amino group is transferred from one amino acid to the keto group of a keto acid.
$(2)$ $Azotobacter$ / $Clostridium$ are free-living bacteria.