The correct option is B Ascomycetes – monokaryotic aseptate mycelium
In ascomycetes, the mycelium is branched, dikaryotic and septate.
In the members of phycomycetes, the mycelium is aseptate and coenocytic. Asexual reproduction takes place by zoospores (motile) or by aplanospores (non-motile).
Based on their mode of sexual reproduction, phycomycetes is further divided into two groups : oomycetes and zygomycetes.
Zygomycetes form zygospores from specialised structures called zygophore.