A patient undergoes a pulmonary function test. Which of the following lung parameters can be measured using simple spirometry alone?
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Correct answer: Vital Capacity (VC)
Simple spirometry measures the volume of air moved into or out of the lungs. Since Residual Volume (RV) cannot be exhaled, any capacity containing RV—such as FRC, TLC, or RV itself—requires advanced techniques like helium dilution or body plethysmography.
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