Microbes are used in:
$1.$ Primary treatment of sewage
$2.$ Secondary treatment of sewage
$3.$ Anaerobic sludge digester
$4.$ Production of bioactive molecules

Which one of the following statements is correct:
$(i)$ Baculoviruses are excellent candidates for species-specific,narrow-spectrum insecticidal applications.
(ii) Bacillus thuringiensis is used to control butterfly caterpillars.
(iii) Ladybird is useful to get rid of mosquitoes.
(iv) Trichoderma fungus is used as a biocontrol agent for animal pathogens.

Name the scientists who were credited for showing the role of Penicillin as an antibiotic.

Correctly match column $I$ with column $II$:

Column $I$	Column $II$
$(A)$ Trichoderma species	$(i)$ Biofertilisers
$(B)$ Rhizobium	$(ii)$ Clot buster
$(C)$ Cyclosporin $A$	$(iii)$ Biocontrol agents
$(D)$ Streptokinase	$(iv)$ Trichoderma polysporum

Which of the following pairs is mismatched?

Match the following columns:

Column-$I$	Column-$II$
$1.$ Silage	$a.$ Measure of water pollution level.
$2.$ Flocs	$b.$ Cattle feed.
$3.$ Biogas	$c.$ Bacteria associated with fungal filaments in water.
$4.$ $BOD$	$d.$ Anaerobic metabolism of organic waste.