Which of the glycosidic linkage galactose and glucose is present in lactose?

$C-1$ of glucose and $C-6$ of galactose

$\mathrm{C}-1$ of galactose and $\mathrm{C}-4$ of glucose

$C-1$ of glucose and $C-4$ of galactose

$C-1$ of galactose and $C-6$ of glucose