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The device that measures the volumes of air moved in breathing is a:
AHygrometer
BSpirometer
CThermometer
DBarometer
Answer & Solution
Correct answer: B. Spirometer
1. Doctors assess lung function by measuring air volumes.
2. A special instrument does this.
3. It is the spirometer.
_Source: NCERT Class 11 Biology, Chapter 17, Breathing and Exchange of Gases._
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