The most common method of asexual reproduction in unicellular Yeast...

Yeast is a unicellular fungus that primarily reproduces asexually through a process called budding. In this process, a small outgrowth or bud develops on the parent cell, which eventually detaches to form a new yeast cell.

Fragmentation is seen in filamentous organisms like Spirogyra.

Binary fission is common in bacteria and Amoeba.

Conidia formation is observed in fungi like Penicillium.

Answer: Budding