This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Vitamins and Minerals, Subject name: Biochemistry
[{'content': 'Which of the following protein has ferroxidase activity? \nSelect and explain. \nA. Albumin, B. Ceruloplasmin, C. Haptoglobin, D. Transferrin', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ceruloplasmin:- Copper-containing ferroxidase. Oxidizes toxic ferrous iron to its non-toxic ferric iron in the serum. This facilitates the transpo of iron by transferrin. This is why aceruloplasminemia leads to hemochromatosis. - Hephaestin is also a copper-dependent ferroxidase that oxidizes ferrous iron to ferric. It works in cooperation with ferropoin in the cells.', 'role': 'assistant'}]