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 estimatea)  FRCb)  VCc)  RVd)  ERVe)  FEV1 \nSelect and explain. \nA. a, B. bc, C. ad, D. ac", 'role': 'user'}, {'content': 'Answer: D \nExplanation: Direct measurement can be done by Spirometry for\n-\xa0\xa0\xa0\xa0\xa0\xa0\xa0 TV, IRV, ERV, VC, Forced vital capacity, FEV1\nDirect measurement by spirometry cannot be done for\n\xa0\n-\xa0\xa0\xa0\xa0\xa0\xa0\xa0 RV, FRC, TLC', 'role': 'assistant'}]