The correct option is C (a) Fucus , (b) Porphyra, (c) Laminaria, (d) Polysiphonia
In order of representation, the images are of Fucus, Porphyra, Laminaria and Polysiphonia respectively. They all belong to the phylum algae. They undergo sexual reproduction and have oogamous gametes.
Fucus and Laminaria belong to the class Phaeophyceae which includes all brown algae. Porphyra and Polysiphonia belong to the class Rhodophyceae which inclide all red algae.