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
[{'content': 'The following are features of adult respiratory distress syndrome except: \nSelect and explain. \nA. Hypoxia, B. Hypocapnia, C. Low protein pulmonary edema, D. Stiff lungs', 'role': 'user'}, {'content': 'Answer: C \nExplanation: 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.', 'role': 'assistant'}]