Which of the following is not an example of green algae?

The correct answer is Option (4) - Dictyota

The members of Chlorophyceae are commonly called green algae. The plant body may be unicellular, colonial, or filamentous. They are usually grass green due to the dominance of pigments chlorophyll a and b. Some commonly found green algae are- Chlamydomonas, Volvox, Ulothrix, Spirogyra, and Chara.

The members of Phaeophyceae or brown algae are found primarily in marine habitats. They show great variation in size and form. The common forms are Ectocarpus, Dictyota, Laminaria, Sargassum, and Fucus.