The correct option is B Saccharomyces
The fungi which belong to Ascomycetes are called as sac fungi. There are many species which are unicellular one among them are Saccharomyces well known as yeast or baker yeast. It grows on grapes and figs. It help in the fermentation of glucose into ethyl alcohol and carbon dioxide by virtue of enzyme like zymase. Thus, the correct answer is option B.