Which one is heterothallic fungus with coenocytic mycelium?

Correct option is A

Correct option (a) Phytophthora infestans
· Belongs to Oomycetes.
· Has coenocytic (aseptate) mycelium.
· Heterothallic requiring two mating types.
Other options:
· (b) Ustilago maydis – Septate mycelium.
· (c) Pythium aphanidermatum – Coenocytic but generally homothallic.
· (d) Alternaria alternata – Septate fungus.
· (e) Incorrect.