Out of following isomeric forms of uracil, which one is present in RNA?

Given below are two statements : one is labelled as Assertion (A) and other is labelled as Reason (R).

Assertion (A) : Sucrose is a disaccharide and a non-reducing sugar.

Reason (R) : Sucrose involves glycosidic linkage between C₁ of $$\beta$$-glucose and C₂ of $$\alpha$$-fructose.

Choose the most appropriate answer from the options given below :

Compound A gives D-Galactose and D-Glucose on hydrolysis. The compound A is :

Which one among the following chemical tests is used to distinguish monosaccharide from disaccharide?