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': "Routine spirometry can't estimate : \nSelect and explain. \nA. FRC, B. VC, C. FEV, D. ERV", 'role': 'user'}, {'content': 'Answer: A \nExplanation: A i.e. FRC', 'role': 'assistant'}]