Assertion: Sucrose is a non reducing sugar.
Reason : Sucrose is a disaccharide formed by glycosidic linkage between C-1 of `alpha`-glucose and C-2 of `beta`-fructose.
A. If both assertion and reason are true and reason is the correct explanation of assertion.
B. If both assertion and reason are true but reason is not the correct explanation of assertion.
C. If assertion is true but reason is false.
D. If both assertion and reason are false.