A) infection of lungs
B) infection of trachea
C) bleeding into pleural cavity
D) spasm in bronchial muscles
Correct Answer: D
Solution :
Asthma is a respiratory disorder due to spasm in bronchial muscles. The episodes may be precipitated by inhalation of allergens or pollutants, infection, cold air, vigorous exercise or emotional stress.You need to login to perform this action.
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