Match the following carbohydrate molecules with the class of molecule that they belong to:
molecules; (i) glucose; (ii) starch; (iii) sucrose
classes: a) polysaccharides b) disaccharides c) monosaccharides
a) i-a; ii-b; iii-c
b) i-b; ii-a; iii-c
c) i-c; ii-a; iii-b
d) i-c; ii-b; iii-a

Carbohydrates are classified according to the number of saccharides they contain. Monosaccharide are called as such for containing only one saccharide like glucose. Disaccharides for containing two saccharide units for instance sucrose which is formed from two glucose molecules. Laslty, polysaccharides for carbohydrates containing more than two saccharide units an example is starch. Thus, the answer is D.