Yeasts poison themselves to death when the concentration of alcohol reaches about $........$ (in $\%$)

Which is used as an immunosuppressive drug during organ transplant?

Match List-$I$ with List-$II$:

List-$I$	List-$II$
$(a)$ Aspergillus niger	$(i)$ Acetic Acid
$(b)$ Acetobacter aceti	$(ii)$ Lactic Acid
$(c)$ Clostridium butylicum	$(iii)$ Citric Acid
$(d)$ Lactobacillus	$(iv)$ Butyric Acid

Choose the correct answer from the options given below:

Which of the following organic acids is produced by fermentation?

$A$ patient brought to a hospital with myocardial infarction is normally immediately given

Which industrial products are synthesized from microbes?
$I.$ Antibiotics
$II.$ Fermented beverages
$III.$ Bioactive molecules
$IV.$ Enzymes
Choose the correct option.