Which microorganism is used for the production of hydroxyprogesterone?

Which process is used to convert carbohydrates present in green plant tissues into silage for cattle feed?

The first antibiotic isolated was:

Which scientists established the full potential of penicillin as an effective antibiotic by improving its production?

Which of the following participates in the manufacturing of dextrans?

Match Column $I$ (Antibiotic) with Column $II$ (Source) and choose the correct option from the codes given below.

Column $I$	Column $II$
$A$. Fumagillin	$1$. Gliocladium virens
$B$. Bacitracin	$2$. Streptomyces griseus
$C$. Streptomycin	$3$. Bacillus polymyxa
$D$. Viridin	$4$. Aspergillus fumigatus
$E$. Polymixin	$5$. Bacillus licheniformis

Codes:
$A \quad B \quad C \quad D \quad E$