Which of the following is a disaccharide?

The correct observation in the following reactions is:
$\text{Sucrose}$ $\xrightarrow[\text{Cleavage (Hydrolysis)}]{\text{Glycosidic bond}} A + B$ $\xrightarrow[\text{reagent}]{\text{Seliwanoff's}} ?$

The indigestible carbohydrate,which is also a constituent of our diet,is

Considering the facts that
$I$. sucrose forms glycosidic linkage between $C_1$ of glucose and $C_2$ of fructose,while
$II$. lactose forms glycosidic linkage between $C_1$ of galactose and $C_4$ of glucose.
Choose the correct statement.

Which of the following on hydrolysis forms invert sugar?

Which is not a reducing sugar?