This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Blood: RBCs, Anemia, and Polycythemia, Subject name: Physiology
[{'content': 'Which is a heme protein - \nSelect and explain. \nA. Hemoglobin, B. Catalase, C. Cytochrome, D. All of the above', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. is 'd' i.e., All of the aboveo Hemoproteins are proteins which have heme as prosthetic group.o Important hemoproteins are hemoglobin, myoglobin, cytochromes (cytochrome C, cytochrome P450), catalase, peroxidase, tryptophan pyrrolase and nitric oxide synthase.", 'role': 'assistant'}]