Which biomolecule forms a starch-iodine complex?

The $C_4$-epimer of glucose is:

Match the structures in Row $I$ with their names in Row $II$.
Row $I$:
$(P)$ $\alpha-D-(+)-$Glucopyranose
$(Q)$ $\beta-D-(+)-$Glucopyranose
$(R)$ $\alpha-D-(-)-$Fructofuranose
$(S)$ $\beta-D-(-)-$Fructofuranose
Row $II$:
$(i)$ $\alpha-D-(-)-$Fructofuranose
$(ii)$ $\beta-D-(-)-$Fructofuranose
$(iii)$ $\alpha-D-(+)-$Glucopyranose
$(iv)$ $\beta-D-(+)-$Glucopyranose
Correct match is:

$A$ nucleoside on hydrolysis gives:

Maltose on hydrolysis gives two monosaccharide units. The incorrect statement about the monosaccharides formed is

What is the product formed when sucrose is treated with concentrated sulfuric acid $(H_2SO_4)$?