Match the following columns:

Column $I$	Column $II$
$1.$ $LAB$	$a.$ Quantum $-4000$
$2.$ $Propionibacterium$ $shermanii$	$b.$ Free-living $N_2$-fixer
$3.$ $Acetobacter$ $aceti$	$c.$ Lactic acid production
$4.$ $Clostridium$ $butylicum$	$d.$ Swiss cheese
$5.$ $Pseudomonas$	$e.$ Biogas
$6.$ $Azospirillum$	$f.$ Acetic acid
	$g.$ Butyric acid

• A
  $(1-c), (2-g), (3-d), (4-f), (5-e), (6-a)$
• B
  $(1-c), (2-a), (3-f), (4-g), (5-d), (6-b)$
• C
  $(1-c), (2-d), (3-f), (4-g), (5-a), (6-b)$
• D
  $(1-c), (2-f), (3-d), (4-g), (5-a), (6-b)$