Hydrocolloid carrageen is obtained from :
Phaeophyceae and Rhodophyceae
Rhodophyceae only
Phaeophyceae only
Chlorophyceae and Phaeophyceae
Carrageenan is a polysaccharide obtained from red seaweed (Rhodophyta) It is a gelatin agent, makes the food via cous & use to make the capsule of medicines.
Hence, the correct option is (2).