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': 'The calculated oxygen concentration in the blood is 0.0025 ml/ml of blood. Considering an atmospheric pressure as 760mmHg, how much would be the approximate oxygen tension in the blood? \nSelect and explain. \nA. 40mmHg, B. 60mmHg, C. 80mmHg, D. 100mmHg', 'role': 'user'}, {'content': "Answer: C \nExplanation: Oxygen tension in the blood (PO2) can be detected using Henry's law. According to Henry's law oxygen dissolved in the blood is propoional to PaO2. Ref: Quantitative Human Physiology: An Introduction, By Joseph Feher, Page 582 ; Review of Medical Physiology, Ganong 21st Edition, Page 670.", 'role': 'assistant'}]