Match the following columns:

Column-$I$	Column-$II$
$A$. Halophiles	$i$. Gram-negative bacteria
$B$. Thermoacidophiles	$ii$. Extremely salty areas
$C$. Spirochetes	$iii$. Responsible for methane production
$D$. Firmicutes	$iv$. Acidic and high temperature environments
	$v$. Gram-positive bacteria

• A
  $A-i, B-ii, C-iii, D-iv$
• B
  $A-v, B-iv, C-iii, D-ii$
• C
  $A-ii, B-iv, C-i, D-v$
• D
  $A-ii, B-iv, C-iii, D-v$