1 MCQs in Medicine for NEET PG
A 22-year-old woman presents with episodic wheeze, nocturnal cough, and chest tightness worse with exercise and cat exposure. Baseline spirometry shows FEV1 65% predicted, FVC 88% predicted, and FEV1/FVC ratio of 0.62 with a concave expiratory limb. Fifteen minutes after inhaled salbutamol 400 μg, FEV1 rises to 80% predicted (improvement of 18% and 410 mL). The paired flow-volume loops marked **B** in the diagram show restoration of the expiratory contour post-bronchodilator. Which of the following best characterizes the spirometric response pattern shown in **B**?
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