How is asthma distinguished from an airway obstruction?
A. Asthma produces wheezing during expirations; airway obstruction produces stridor during inspirations.
B. Asthma produces stridor during expirations; airway obstruction produces wheezing during inspirations.
C. Asthma produces wheezing during inspirations; airway obstruction produces stridor during expirations.
D. Asthma produces stridor during inspirations; airway obstruction produces wheezing during expirations.
Answer: A
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