Gel matrices are generally of two types Agarose and Polyacrylamide. Which of the statements is correct with respect to agarose gels?

• A. Agarose is a polysaccharide which is obtained from red algae
• B. Agarose is a polysaccharide obtained from fungus
• C. It is composed of glucose residues
• D. It is obtained via dissolving in its water by boiling in water and then cooling it