<prompt> Characteristic symptom of asthma -ClubbingWheezingStridorBradycardia  <response>: Ans. is b i.e., Wheezing Clinical manifestations of asthma Wheezing -- Mast characteristic of asthma Flaring of nostrils Fatigue Hyper-resonant chest In chronic cases chest becomes barrel shaped Cough Cyanosis Tachycardia Dysnea Apprension, restlessness Pulsus paradoxus Cardiac arrhythmias due to sever hypoxemia Intercostal and suprasternal retraction -- Excessive use of accessory muscles of respiration. 