The correct combination of enzyme and metal ion at the active site is
1
Hemoglobin (Fe2+), Carboxypeptidase (Zn2+). Carbonic anhydrase Cu2+)
2
Hemoglobin (Fe3+), Carboxypeptidase (Cu2+), Carbonic anhydrase (Zn2+)
3
Hemoglobin (Fe2+), Carboxypeptidase (Zn2+), Carbonic anhydrase (Zn2+)
4
Hemoglobin (Fe3+), Carboxypeptidase (Zn2+), Carbonic anhydrase (Zn2+)