Which microorganism is used for the production of acetic acid?

Which of the following is produced by $Monascus$ $purpureus$?

The yeast $Monascus$ $purpureus$ is used for the commercial production of:

$S$ - Statement: The fermentation process of microbes is also used to produce certain vitamins.
$R$ - Reason: Riboflavin is produced by $Ashbya$ $gossypii$.

Rennet is used in

Which of the following substrates is used in the formation of alcohol?