This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Physiology
[{'content': 'What will be hemoglobin saturation, if P02 is 60 mm Hg at pH 7.4 and temperature 37degC ? \nSelect and explain. \nA. 50%, B. 60%, C. 75%, D. 90%', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. is `d' i.e., 90%Examiner is asking about Hb saturation at PO2 60 mmHg, under normal physiological conditions (pH 7.4, temperature 37degC). At PO2 60 mmHg, Hb saturation is 89%.", 'role': 'assistant'}]