Vitamin $B_{12}$ is produced directly during the course of fermentation by
Ashbya gossypii
Rhizopus stolonifer
Saccharomyces cerevisiae
Propioni bacteria
Fill up the blanks.
$(I)$ Ethanol is produced by $...a...$
$(II)$ Large scale production of beverages inindustries is done in very large vesselscalled $ ...b...$
$(III)$ Penicillin is discovered by $...C...$
$(IV)$ LAB checks disease causing microbes in $...d...$ $a$ to $d$ in the above statements refers to
Which of the following enzyme is secreted by yeast, responsible for fermentation