The antibiotic chloromycetin is prepared from . . . . . . .

Match the following (column-$I$ with column-$II$):

Column-$I$ (Microbes)	Column-$II$ (Organic acid)
$a$. Aspergillus niger	$(i)$ Butyric acid
$b$. Clostridium butylicum	$(ii)$ Citric acid
$c$. Acetobacter aceti	$(iii)$ Lactic acid
$d$. Lactobacillus	$(iv)$ Acetic acid

$Bacillus$ $megatherium$ is used in:

Which of the following scientists established penicillin as an effective antibiotic?
$(i)$ Ernst Chain
$(ii)$ Alexander Fleming
$(iii)$ Howard Florey
$(iv)$ Waksman

. . . . . . are used in detergent formulations and are helpful in removing oily stains from laundry.

Which of the following options represents the correct matching for the given lists?

List-$I$	List-$II$
$(p)$ $Clostridium$ $butylicum$	$(i)$ Vitamins
$(q)$ $Rhizopus$ $nigricans$	$(ii)$ Sterins
$(r)$ $Ashbya$ $gossypii$	$(iii)$ Steroids
$(s)$ $Monascus$ $purpureus$	$(iv)$ Butyric acid