What happen when fructose undergo reduction?

The formulas of $\mathrm{A}$ and $\mathrm{B}$ for the following reaction sequence are

Match items of Row I with those of Row II.

Row I:

(P)

(Q)

(R)

(S)

Row II:

(i) $\mathrm{\alpha }‐\mathrm{D}‐(—)$ Fructofuranose.

(ii) $\mathrm{\beta }‐\mathrm{D}‐(—)$ Fructofuranose.

(iii) $\mathrm{\alpha }‐\mathrm{D}‐(‐)$ Glucopyranose.

(iv) $\mathrm{\beta }‐\mathrm{D}‐(‐)$ Glucopyranose.

Correct match is

Number of stereo centers present in linear and cyclic structures of glucose are respectively:

 The correct observation in the following reaction is:

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

Identify the product $\mathrm{Y}$ in following reaction $\mathrm{Maltose}\stackrel{ \mathrm{Hydrolysis} }{⟶}\mathrm{X}\underset{\left(\mathrm{excess}\right)}{\overset{\mathrm{dil}.{\mathrm{HNO}}_3}{\to }}\mathrm{Y}$