Assertion: Cellulose is not digested by human beings. Reason: Cellulose is a polymer of β-D-glucose.

Both Assertion and Reason are correct and the Reason is the correct explanation for the Assertion. Both Assertion and Reason are correct and the Reason is not the correct explanation for the Assertion. Assertion is correct but the Reason is incorrect.   Both Assertion and Reason are incorrect.

Both Assertion and Reason are correct and the Reason is not the correct explanation for the Assertion.

Enzymes which hydrolyze the β-glycosidic linkages and are not present in human beings.