urgent~~以下兩條 statement, 如有錯, 請更正

a) It's correct

b) Whether the polysaccharides are water soluble or not, it isn't depends on whether the monomers are water soluble or not. Even through there are some examples. But well, I've answered in another question. Like cellulose, its monomer is Beta-Glucose. But itself isn't soluble in water, right? Whether it is water-soluble, most are depends on their Hydrogen bond formation. So b) is incorrect

The most important biological is aldehydes or ketones which readilily forms furanose or pyraose (5- or 6-mwmbwe cyclic structures) by intamolecular hemiacetal or hemiketal formation.

Polysaccharides is water soluble if its component, monosaccharides, is water soluble. Examples can be found in amylopectin and heparin.