Which carbon atoms of $\alpha-D$-glucopyranose and $\beta-D$-fructofuranose respectively are linked together to form the glycosidic linkage in sucrose?

• A
  $C-2$ of $\alpha-D$-glucopyranose and $C-3$ of $\beta-D$-fructofuranose
• B
  $C-1$ of $\alpha-D$-glucopyranose and $C-6$ of $\beta-D$-fructofuranose
• C
  $C-2$ of $\alpha-D$-glucopyranose and $C-2$ of $\beta-D$-fructofuranose
• D
  $C-1$ of $\alpha-D$-glucopyranose and $C-2$ of $\beta-D$-fructofuranose