Male gametes are flagellated in Ectocarpus, Spirogyra, Anabaena, Polysiphonia?

Ectocarpus is a brown alga. It is abundantly found throughout the world in cold waters. The male gametes typically contain a single chloroplast with a pyrenoid and a prominent concave eye spot, into which the swelling of the posterior flagellum (the photoreceptor) fits.Thus, the correct answer is option A.