This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: miscellaneous, Subject name: Biochemistry
[{'content': 'Ceruplasmin contains- \nSelect and explain. \nA. Zn, B. Cu, C. Se, D. Fe', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ceruloplasmin is the major copper-carrying protein in the blood, and in addition plays a role in iron metabolism.', 'role': 'assistant'}]