This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Biochemistry
[{'content': 'Which type of hemoglobin is not normally found within human erythrocytes? \nSelect and explain. \nA. HbA, B. HbA2, C. HbCO, D. HbO2', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Adult erythrocytes normally do not contain any carboxyhemoglobin, which is formed when hemoglobin binds carbon monoxide. Ref : Biochemistry by U. Satyanarayana 3rd edition Pgno : 206', 'role': 'assistant'}]