What is the glycosidic linkage in sucrose?

The correct answer is Option (1) → α-1,β-2-glycosidic linkage

“α-1,β-2” means the bond joins C1 of α-D-glucose to C2 of β-D-fructose.

NCERT (2026-27 edition):
10.1.3 Disaccharides – “(i) Sucrose: One of the common disaccharides is sucrose which on hydrolysis gives equimolar mixture of D-(+)-glucose and D-(−) fructose.”
“These two monosaccharides are held together by a glycosidic linkage between C1 of α-D-glucose and C2 of β-D-fructose.”