Which of the Following Is Not True About the Enzyme

Which of the following is not true about the enzyme carboxypeptidase A?

A) Arg 145 and Tyr 248 are involved in the catalytic process of the enzyme.
B) The metal ion in carboxypeptidase A is partially liganded to the oxygen of the carbonyl group that will be hydrolyzed.
C) Carboxypeptidase A catalyzes the hydrolysis of the C-terminal peptide bond in proteins.
D) Carboxypeptidase A is a metalloenzyme.
E) The metal ion in carboxypeptidase is a Cu⁺².