Sexual reproduction in algae results in the formation of

Explanation:

Conjugation is the most basic form of sexual reproduction in algae, in which two similar organisms fuse, exchange genetic material, and then split up.

Two long, unbranched filaments link via conjugation tubes, through which genetic material is transmitted between cells, in Spirogyra, which produces both asexually and sexually.

The merging of specific reproductive cells, called gametes, to form a single cell, known as a zygote, is a more complicated form of sexual reproduction in most multicellular algae.

Final Answer: Option (C Zygote