Which of the following statements is false?

Organisms known as methanogens are found in abundance in ............ .

$A$ bacterium is capable of withstanding extreme heat,dryness,and toxic chemicals. This indicates that it is probably able to form

$A$ characteristic feature linking Monera is .........

Given below are two statements:
Statement $I$: Mycoplasma can pass through less than $1 \ \mu m$ filter size.
Statement $II$: Mycoplasma are bacteria with cell wall.
In the light of the above statements,choose the most appropriate answer from the options given below:

$S$: Thermoacidophiles survive in acidic and high-temperature conditions.
$R$: Archaea can survive in extreme conditions.