Which of the following is correct regarding amino acids produced by microbes?

How are microbes useful in industrial production of chemicals,enzymes and other bioactive molecules?

$A$: Fermentation stops when the alcohol concentration in a sugar solution reaches about $13 \%$.
$R$: $Saccharomyces \ cerevisiae$ are killed by the high concentration of alcohol,and zymase activity is inhibited.

Which of the following is helpful in the production of industrial alcohol?

Assertion $A$: Fungi are used to ripen Roquefort cheese.
Reason $R$: $Propionibacterium$ $sharmanii$ is used for Swiss cheese.
Which option is correct for Assertion $A$ and Reason $R$?

Which bacterium is used to produce Swiss cheese?