A closed ascocarp without an ostiole is known as –

Correct option is A

Correct option: (a) Cleistothecium
· Cleistothecium is a completely closed ascocarp with no opening (ostiole).
Other options:
· (b) Pseudothecium – Has an ostiole and bitunicate asci.
· (c) Apothecium – Open cup-like ascocarp.
· (d) Perithecium – Flask-shaped ascocarp with an ostiole.