<prompt> The characteristic symptom of asthmaClubbingWheezingStridorBradycardia  <response>: Clinical manifestations of asthmaWheezing Mast characteristic of asthma Flaring of nostrils FatigueA cough CyanosisDyspnea Apprehension, restlessness Tachycardia Pulsus paradoxus Hyper-resonant chest In chronic cases, chest becomes barrel shaped Cardiac arrhythmias due to sever hypoxemia Intercostal and suprasternal retraction Excessive use of accessory muscles of respiration. 