Which of the following statements is correct regarding microbes in human welfare?

Options

A. Saccharomyces cereviceae is useful in industries for production of citric acid
B. Trichoderma polysporum is used as blood cholestrol lowering agent
C. Aspergilus niger used to obtain acetic cid
D. In sewage treatment `CO_(2), H_(2)` and `CH_(4)` gases are produced from activated sludge by bacteria such as Methanobacterium

Answer

D