This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Miscellaneous Questions, Subject name: Medicine
The following are features of adult respiratory distress syndrome except: 
Select and explain. 
A. Hypoxia, B. Hypocapnia, C. Low protein pulmonary edema, D. Stiff lungs
C: Low protein pulmonary edema
Answer: C: Low protein pulmonary edema 
Explanation: ARDS has type 1 respiratory failure and hence choice A and B are correct. Stiff lungs are explained by decreased lung compliance. Since ARDS is an exudate, it is characterized by high protein pulmonary edema.