Which of the following is the correct structure of Sucrose?

$1-\mathrm{\alpha }-\mathrm{D}-$ glucose -4-$\mathrm{\beta }$ -D – Fructose

$1-\mathrm{\beta }-\mathrm{D}-$ glucose-2-$\mathrm{\beta }$ -D –Fructose

$1-\mathrm{\alpha }-\mathrm{D}-$ glucose-2-$\mathrm{\beta }$ -D – Fructose

$1-\mathrm{\alpha }-\mathrm{D}-$ Fructose-4-$\mathrm{\beta }$ -D –glucose