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Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
In obstructive lung all are true EXCEPT
assistant
The correct answer is  Residual volume normal REF: Harrison's Internal Medicine 17th ed> Chapter 246. Disturbances of Respiratory Function See APPENDIX-53 for "OBSTRUCTIVE VS RESTRICTIVE LUNG DISEASE"