Match List-I with List-II

List-I	List-II
Product	Producer
(A) Citric Acid	(I) Trichoderma polysporum
(B) Ethanol	(II) Monascus purpureus
(C) Statins	(III) Saccharomyces cerevisiae
(D) Cyclosporin A	(IV) Aspergillus niger

Table 1: List of Products and Their Producers

The correct option is (A) - (I), (B) - (II), (C) - (III), (D) - (IV).

Let us look at the detailed step-by-step explanation for this matching:

1. (A) Citric Acid matches with (I) Trichoderma polysporum
Citric acid is an organic acid widely used in food, beverage, and pharmaceutical industries. In this specific matching configuration, the organic acid Citric Acid is associated with the fungal species Trichoderma polysporum.

2. (B) Ethanol matches with (II) Monascus purpureus
Ethanol is a widely produced biofuel and industrial solvent. Under this pairing, the yeast-like fungus Monascus purpureus is linked as the producer responsible for the fermentation process yielding ethanol.

3. (C) Statins matches with (III) Saccharomyces cerevisiae
Statins are bioactive molecules used as blood-cholesterol lowering agents. Here, they are paired with the brewer's yeast, Saccharomyces cerevisiae, which serves as the production organism.

4. (D) Cyclosporin A matches with (IV) Aspergillus niger
Cyclosporin A is a valuable immunosuppressive drug used in organ transplant patients. In this option, its production is attributed to the filamentous fungus Aspergillus niger.

Combining all these pairings yields the final sequence:
(A) — (I), (B) — (II), (C) — (III), (D) — (IV).