Which of the following needs to be hydrolysed before it shows reducing property?

Sucrose needs to be hydrolysed before it shows reducing property. Sucrose is a non-reducing sugar, meaning it does not have a free aldehyde or ketone group that can participate in oxidation-reduction reactions. To show reducing property, it needs to be hydrolyzed into its component monosaccharides, glucose, and fructose. This is because glucose and fructose are reducing sugars as they have free aldehyde and ketone groups that can participate in oxidation-reduction reactions. Thus, hydrolysis of sucrose is necessary to break the glycosidic bond between glucose and fructose and convert them to free sugars that can show reducing properties.