The correct answer is option (D): (i-R); (ii-P); (iii-Q); (iv-S)
1. Propionibacterium Shermanni is a gram-positive bacteria. It is highly used in the production of Swiss cheese. This bacteria produces, acetate, propionic acid, and carbon dioxide as a by-product. 2. Saccharomyces Cerevisiae is widely used to produce ethanol through fermenting fruit juices. They have a probiotic activity and thus inhibit pathogenic bacterial growth. 3. Aspergillus niger is a workhouse for the production of citric acid. Microbial acid is an organic acid widely used in pharmaceutical food and beverages. 4. Trichoderma polypore produces cyclosporin A that acts as an immunosuppressor during organ transplant