Correct option: A
Explanation: Yeast shows asexual reproduction by budding, where a small bud os formed on the parent bud.
The asexual reproduction in Penicillium starts with the development of asexual non-motile spores called conidia.
Asexual reproduction in filamentous algae is by fragmentation.
The asexual reproduction in Chlamydomonas is by zoospores.