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

 The correct observation in the following reaction is:

$\mathrm{Sucrose}\underset{}{\overset{\mathrm{Glycosidic} \mathrm{bond} \mathrm{Cleavage} \left(\mathrm{Hydrolysis}\right)}{\to }}\mathrm{A}+\mathrm{B}\underset{}{\overset{\mathrm{Seliwanoff} \mathrm{Reagent}}{\to }}?$

Consider the following reactions :

(i) Glucose $+\mathrm{ROH}\stackrel{\mathrm{dry}\mathrm{HCI}}{\to }\mathrm{Acetal}\underset{{\left({\mathrm{CH}}_3\mathrm{CO}\right)}_2}{\overset{\mathrm{x}\mathrm{eq}.\mathrm{of}}{\to }}$ acetyl derivative

(ii) Glucose $\stackrel{\mathrm{Ni}/{\mathrm{H}}_2}{\to }\mathrm{A}\underset{{\left({\mathrm{CH}}_3\mathrm{CO}\right)}_2\mathrm{O}}{\overset{\mathrm{y}\mathrm{eq}.\mathrm{of}}{\to }}$ acetyl derivative

(iii) Glucose $\underset{{\left({\mathrm{CH}}_3\mathrm{CO}\right)}_2\mathrm{O}}{\overset{\mathrm{z}\mathrm{eq}.\mathrm{of}}{\to }}$ acetyl derivative '$\mathrm{x}$' , '$\mathrm{y}$' and '$\mathrm{z}$' in these reactions are respectively.