Which of the following microbes is correctly paired with its function?

Step-by-step solution

Aspergillus niger carries out fermentation to form citric acid. Fungus Trichoderma polysporum produces cyclosporin through fermentative activity. Cyclosporin-A has antifungal, anti-inflammatory and immunosuppressive properties. Saccharomyces cerevisiae (baker's yeast/brewer's yeast) is used in production of bread/alcohol. Methanogenic bacteria carry out microbial decomposition of organic matter and aids in gobar gas production.