Fungi are classified into four major classes based on which of the following characters-
A. Morphology of mycelium 
B. Mode of spore formation
C. Fruiting bodies

detailed solution

Correct option is D

Fungi are classified into four major classes known as Phycomycetes, Ascomycetes, Basidiomycetes and Deuteromycetes based on morphology of mycelium, mode of spore formation and fruiting bodies. In Phycomycetes, the asexual spores are zoospores or aplanospores. In Ascomycetes and Deuteromycetes they are exogenously formed in chains and known as conidia. In Basidiomycetes formation of asexual spores is uncommon. The mycelium of Phycomycetes is coenocytic and aseptate. In Basidiomycetes and Ascomycetes, it is septate and monokaryotic as well as dikaryotic. In Deuteromycetes it is septate and monokaryotic. Sexual fruiting bodies are absent in Phycomycetes and Deuteromycetes. The sexual fruiting bodies of Ascomycetes are ascocarps and that of basidiomycetes are Basidiocarps.