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 binds to free heme? \nSelect and explain. \nA. Ceruloplasmin, B. Haptoglobin, C. Hemopexin, D. Hemosiderin', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ans: c) Hemopexin Option analysis: Binding protein Ceruloplasmin is a copper containing protein Haptoglobin Free Haemoglobin Hemosiderin Denatured ferritin Hemopexin is a b1-globulin that binds free heme', 'role': 'assistant'}]