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: Anaesthesia
[{'content': 'In a typical blood gas analyser \nSelect and explain. \nA. Oxygen tension will be overstimulated in hypothermia, B. pH is a derived measurement, C. Standard bicarbonate can be used to indicate the respiratory component, D. The oxygen tension can be measured using Clarke electrode.', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Oxygen tension falls with hypothermia. The pH electrode directly measure pH. The standard bicarbonate measured in sample titrated to pCO2\xa0of 5.3 kPa, which\xa0eliminates respiratory component.', 'role': 'assistant'}]