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: Pathology
Long term complication of bronchopulmonary dysplasia is -a) Decreased fuctional residual capacityb) Small airway diseasec) Large airway diseased) Interstitial lung disease 
Select and explain. 
A. acd, B. bcd, C. abd, D. ab
C: abd
Answer: C: abd 
Explanation: Bronchopulmonary dysplasia is a result of lung injury in infants requiring mechanical ventilation and Supplemental oxygen.
Following changes are seen :

Airway epithelial hyperplasia and squamous metaplasia  
Peribronchial as well as interstitial fibrosis.
Thickening of basement membrane
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There are four pathalogic stages :


Acute lung injury      
Exudative bronchiolitis   
Proliferative bronchiolitis
Obliterative fibroproliferative bronchiolitis.