Microbes in Human Welfare

Cyclosporin A, which is used as an immunosuppressive agent in organ-transplant patients, is produced by the fungus $Trichoderma\ polysporum$. This pair is correct.
$Monascus\ purpureus$ (a yeast) produces statins, which are blood-cholesterol lowering agents, not a drug for swine flu.
$Penicillium$ gives the antibiotic penicillin; the 'clot buster' used for heart patients, streptokinase, comes from the bacterium $Streptococcus$.
No AIDS drug is obtained from $Pseudomonas$.
Hence the correct option is organ-transplant and $Trichoderma$.

$Clostridium\ butylicum$ (a bacterium) produces butyric acid; lactic acid is produced by $Lactobacillus$. So this match is wrong.
$Aspergillus\ niger$ (a fungus) produces citric acid – correct.
The yeast $Monascus\ purpureus$ produces statins, the blood-cholesterol lowering agents – correct.
$Acetobacter\ aceti$ (a bacterium) produces acetic acid – correct.
Hence the wrong matching is $Clostridium\ butylicum$ – lactic acid.

Organic farming is a cyclical, zero-waste method of farming in which the waste products of one process are cycled in as nutrients for other processes.
It uses only naturally produced inputs such as compost, manure, biofertilisers and biological pest control, so (B) is correct.
It avoids chemical inputs: no synthetic pesticides and no chemical fertilisers such as urea, so (C) is correct.
Genetically modified crops such as Bt cotton are not part of organic farming, so (A) is wrong.
Organic farming is defined by the way the crop is grown; it does not by itself make vegetables richer in vitamins and minerals (that is biofortification), so (D) is wrong.
Hence the correct statements are (B) and (C) only.