Identify the disaccharide/linkage asked in the question

The question asks for the compound having a glycosidic linkage between:

• $C_1$ of $\alpha$-glucose, and
• $C_2$ of $\beta$-fructose.

This is the characteristic linkage: $\alpha\text{-D-glucopyranosyl}-(1\to 2)-\beta\text{-D-fructofuranoside}$

Recall common disaccharides/polysaccharides

• Maltose: two glucose units joined by an $\alpha(1\to4)$ glycosidic bond.
• Sucrose: glucose + fructose joined by an $\alpha(1\to2)\beta$ glycosidic bond.
• Lactose: galactose + glucose joined by a $\beta(1\to4)$ glycosidic bond.
• Amylose: polymer of glucose units with repeated $\alpha(1\to4)$ linkages.

Match with the given linkage

The linkage between $C_1$ of $\alpha$-glucose and $C_2$ of $\beta$-fructose is found in sucrose.

Evaluate the options

• A: maltose $\to$ Incorrect
• B: sucrose $\to$ Correct
• C: lactose $\to$ Incorrect
• D: amylose $\to$ Incorrect

Final answer

$\boxed{\text{B: sucrose}}$

Comparison with stored correct answer

Stored correct answer: B

My derived answer: B

Hence, the answer agrees with the stored correct answer.