Q .     Which one of the following statements is wrong?

NEET 2016
A

Agar-agar is obtained from Gelidium and Gracilaria.

B

Laminaria and Sargassum are used as food.

C

Algae increase the level of dissolved oxygen in the immediate environment.

D

Algin is obtained from red algae, and carrageenan from brown algae.

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