To solve this problem, we need to match the organisms in List I with their corresponding products in List II. Let's analyze each organism:$\newline \bullet$A. Clostridium butylicum: This bacterium is known for producing butyric acid through fermentation.$\newline$This matches with III. Butyric acid.$\newline \bullet$B. Saccharomyces cerevisiae: This yeast is commonly used in the production of ethanol through the fermentation of sugars.$\newline$This matches with I. Ethanol.$\newline \bullet$C. Trichoderma polysporum: This fungus is known for producing the immunosuppressive drug Cyclosporin-A.$\newline$