The correct option is C Ascomycetes
Any fungus of the phylum Ascomycota (formerly class Ascomycetes) in which the spores (ascospores) are formed inside a club-shaped cell (ascus) are called ascomycetes. The group includes yeast, penicillium, aspergillus, truffles and certain mildews. So, answer is- 'Ascomycetes'.