This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pediatrics
The characteristic symptom of asthma – 
Select and explain. 
A. Clubbing, B. Wheezing, C. Stridor, D. Bradycardia
B: Wheezing
Answer: B: Wheezing 
Explanation: Clinical manifestations of asthma

Wheezing Mast characteristic of asthma                                      
Flaring of nostrils                                                                          
Fatigue
A cough   
Cyanosis
Dyspnea       
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.