An example of metalloprotein is: (A) Casein, (B) tyrosinase, (C) Gelatin, (D) Salmine
Answer is B. Metalloproteins: They contain metal ions. Examples are Hemoglobin (Iron), Cytochrome (Iron), Tyrosinase (Copper) and Carbonicanhydrase (Zinc).
Reference: Vasudevan 7th  ed, pg 43