Which is non-reducing sugar?

Correct option is B

✅ (b) Sucrose: • Sucrose is a non-reducing disaccharide, composed of glucose and fructose linked via glycosidic bond between their reducing ends. • This linkage prevents the free aldehyde or ketone group from reacting, making it non-reducing.
❌ (a) Glucose: • A reducing sugar due to its free aldehyde group.
❌ (c) Fructose: • Though a ketose, it is also a reducing sugar in basic solution.
❌ (d) None of these: • Incorrect, as (b) is correct.