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