A subject inspires a mixture of gases containing carbon monoxide and holds his breath for 10minutes. During those 10seconds, alveolar Pco is 0.5mmHg and the CO uptake is 25ml/min. Which of the following is the diffusing capacity of the lung for CO?
5 ml/min/mmHg 15 ml/min/mmHg 50 ml/min/mmHg 150 ml/min/mmHg