This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Respiratory system, Subject name: Physiology
[{'content': 'By spirometry, one can measure \nSelect and explain. \nA. Residual volume, B. FRC, C. TLC, D. Tidal volume', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Most lung volumes are measured by Spirometer. Residual volume, total lung capacity, and functional residual capacity cannot be measured with a spirometer.Ref: Ganong review of medical physiology 23rd edition Page no: 593', 'role': 'assistant'}]