Which of the following is invert sugar?

The indigestible carbohydrate,which is also a constituent of our diet,is

Which of the following represents the anomer of the compound shown?

Assertion $(A)$: Both Glucose and Fructose have the same $D$-configuration.
Reason $(R)$: Both Glucose and Fructose are dextrorotatory.
The correct option among the following is:

If the sweetness value of cane sugar is taken as $10$,then the sweetness value of glucose will be ...... .

Complete hydrolysis of cellulose yields .......