Both (A) and (B) are true
(A) is true but (B) is false
(A) is false but (B) is true
Both (A) and (B) are false
Correct option is B. (A) is true but (B) is false. Coenzyme or metal ion that is tightly bound to enzyme protein is called prosthetic group. A complete catalytically active enzyme with its bound prosthetic group is called holoenzyme. So, the correct answer is '(A) is true but (B) is false'.