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 neonate presents with respirotory distress with enlargement of left upper lobe of lung and mediastinal shift towards the right. What is the most likely diagnosis ? 
Select and explain. 
A. Cong lobar emphysema, B. Alpha 1 antitrypsin deficiency, C. Pneumonia, D. Cystic fibrosis
A: Cong lobar emphysema
Answer: A: Cong lobar emphysema 
Explanation: Unilateral hyperinflated lung lobar emphysema foreign body lymph node this is due to paial obstruction of bronchus expansion ofchest with inspiration on affected side will be less. Ref : PAEDIATRICS CLINICAL EXAMINATION BY A.SANTHOSH KUMAR,PG NO:365,4TH EDITION