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
2 year old child developed sudden bouts of cough, breathlessness and respiratory distress after swallowing coins during playing. Chest x-ray was done. what is the probable diagnosis 
Select and explain. 
A. Pneumonia on Right side, B. Obstructive emphysema on left side, C. Bronchiectasis, D. Pleural effusion
B: Obstructive emphysema on left side
Answer: B: Obstructive emphysema on left side 
Explanation: Chest x-ray shows increased lucency on left side, suggesting hyperinflated chest on left side.