Which of the following is a polysaccharide?

The correct answer is Option (3) → Glycogen

Carbohydrates are classified by their behaviour on hydrolysis. A polysaccharide gives a large number of monosaccharide units on hydrolysis. Glycogen is the carbohydrate reserve of the animal body (animal starch); it is a highly branched polymer of glucose units, like amylopectin.

Why the other options are incorrect

Option (1) Sucrose — Incorrect. It is a disaccharide: one molecule gives only one molecule of glucose and one of fructose on hydrolysis, not a large number of units.

Option (2) Fructose — Incorrect. It is a monosaccharide (a ketohexose) and cannot be hydrolysed further.

NCERT (2026-27 edition):
10.1.1 Classification of Carbohydrates – “(iii) Polysaccharides: Carbohydrates which yield a large number of monosaccharide units on hydrolysis are called polysaccharides. Some common examples are starch, cellulose, glycogen, gums, etc.”