Which of the powdery fungi has endophytic mycelium with bulbous appendages at base?

Answer: Option A

Phyllactinia of the powdery fungi has endophytic mycelium with bulbous appendages at the base.
Phyllactinia is another powdery mildew genus occurring on Fraxinus species worldwide. This genus is characterized by having a semi-endoparasitic habit with both endophytic and superficial mycelia formed in and on host leaves.
P. guttata is characterized by large ascomata, long narrow pointed appendages with bulbous swellings at the base, and 2- or 3-spored asci with large ascospores; the ascomata also have gelatinous cells with tufts of hyphae somewhat resembling hairs.