Assertion (A) A co-enzyme or metal ion that is very tightly bound to enzyme protein called prosthetic group. Reason (R) A complete, catalytically active enzyme together with its bound prosthetic group is called apoenzyeme.

• A. If both Assertion and Reason are true and Reason is 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 and false