Sucrose on hydrolysis gives

Given below are two statements :
Statement $I :$ $D$-glucose pentaacetate does not react with $2,4$-dinitrophenylhydrazine.
Statement $II :$ Starch,on heating with dilute sulfuric acid at $393 \ K$ and $2-3 \ \text{atmosphere}$ pressure,produces glucose.
In the light of the above statements,choose the correct answer from the options given below.

Milk contains which of the following disaccharides?

Identify the product obtained when sucrose is treated with conc. $H_2 SO_4$.

Identify the carbon atoms of $\alpha$-glucose and $\beta$-fructose forming the glycosidic linkage in sucrose.

Which of the following is a reducing sugar?