This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Other Respiratory Disorders, Subject name: Pediatrics
A 4-year-old child developed sudden bouts of cough & respiratory distress after eating peanuts. His Chest X ray shows the following; Diagnosis? 
Select and explain. 
A. Obstructive emphysema right side, B. Obstructive emphysema left side, C. Pneumonia, D. Bronchiectasis
B: Obstructive emphysema left side
Answer: B: Obstructive emphysema left side 
Explanation: This chest X-ray shows increased radiolucency of left hemithorax suggestive of hyperinflated chest on left side Foreign body aspiration could be the probable underlying cause- Obstructive emphysema left side