Cells in a continuous culture system are maintained in:

Cyclosporin-$A$,an immunosuppressive drug,is produced by the fungus:

Assertion $A$: Cyclosporin-$A$ is used in organ transplantation of patients.
Reason $R$: It reduces the cholesterol level in the blood.
Which option is correct for Assertion $A$ and Reason $R$?

Match the following and select the correct option:

$I$. Citric acid	$A$. Lactobacillus
$II$. Acetic acid	$B$. Acetobacter aceti
$III$. Butyric acid	$C$. Aspergillus niger
$IV$. Lactic acid	$D$. Clostridium butylicum

$Saccharomyces$ $cerevisiae$ is used in the production of:

Ethanol is produced by fermenting of malted cereals by . . . . . . .