The correct option is A Chrysophyta
Chrysophytes are characterized by presence of yellow and brown carotenoids which impart them golden colour; hence the name golden algae; Option A is correct answer. Pyrrophyta is reddish brown algae which are characterized by presence of peridinin that impart red-brown color. Option B is incorrect. Euglenophyta are characterized by presence of chlorophyll a, b and carotenes; they can be red/green/colourless. Option C is incorrect. Cyanohyta is also known as blue green algae as they are the only bacteria that carry out oxygenic photophosphorylation like that of algae and green plant; hence the name blue green algae. Option D is incorrect. Thus, the correct answer is option A.