a
Sucrose $\xrightarrow{\mathrm{H}_3 \mathrm{O}^{+}}$Glucose + Fructose
Specific rotation $+52.5^{\circ} \quad-92^{\circ}$ (mixture of products is laevorotatory)
Sucrose $\xrightarrow{\mathrm{Br}_2+\mathrm{H}_2 \mathrm{O}}$ No reaction
$\mathrm{BCD} \Rightarrow$ reducing sugars, will get oxidized by $\mathrm{Br}_2+\mathrm{H}_2 \mathrm{O}$