$A$ - Scientist Alexander Fleming discovered the first antibiotic.
$R$ - Methanogens are used for fermenting malted cereals and fruit juices to produce ethanol.

Select the odd one out.

Which of the following microbes is $\text{NOT}$ involved in the preparation of household products?
$A.$ Aspergillus niger
$B.$ Lactobacillus
$C.$ Trichoderma polysporum
$D.$ Saccharomyces cerevisiae
$E.$ Propionibacterium sharmanii
Choose the correct answer from the options given below:

Given below are two statements: one is labelled as Assertion $(A)$ and the other is labelled as Reason $(R)$ :
Assertion $(A)$ : $Spirulina$ is a microbe that can be used for reducing environmental pollution.
Reason $(R)$ : $Spirulina$ is a rich source of protein,carbohydrates,fats,minerals and vitamins.
In the light of the above statements,choose the most appropriate answer from the options given below:

Which of the following statements is false?

Match the following columns:

Column-$I$	Column-$II$	Column-$III$
$I$. $Ashbya$ $gossypii$	$d$. Hydroxy progesterone	$p$. Cholesterol lowering agent
$II$. $Trichoderma$ $polysporum$	$e$. Statins	$q$. Contraceptive pills
$III$. $Rhizopus$ $nigricans$	$f$. Riboflavin	$r$. Organic acid
$IV$. $Monascus$ $purpureus$	$g$. Itaconic acid	$s$. Immunosuppressive agent
	$h$. Cyclosporin-$A$	$t$. Vitamin