Which one of the following statements is wrong
Agar-Agar is obtained from Gelidium and Gracilaria
Laminaria and Sargassum are used as food
Algae increase the level of dissolved oxygen in the immediate environment
Algin is obtained from red algae and carrageenan from brown algae
Algin is obtained from brown algae, whereas carrageenan is obtained from red algae. hence option (4) is the correct answer.