Which of the following pairs is of unicellular algae?
(a) Laminaria and Sargassum
(b) Gelidium and Gracilaria
(c) Anabaena and Volvox
(d) Chlorella and Spirulina
(a) Laminaria and Sargassum
(b) Gelidium and Gracilaria
(c) Anabaena and Volvox
(d) Chlorella and Spirulina