$S:$ Methanogens are responsible for the production of methane.
$R:$ They can survive even in acidic and high-temperature conditions.

  • A
    $S$ and $R$ are both true,and $R$ is the correct explanation of $S$.
  • B
    $S$ and $R$ are both true,but $R$ is not the correct explanation of $S$.
  • C
    $S$ is true and $R$ is false.
  • D
    $S$ is false and $R$ is true.

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