This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Medicine
Which of the following is not seen in ARDS? 
Select and explain. 
A. Hypoxemia, B. Hypercapnia, C. Pulmonary edema, D. Stiff lung
D: Stiff lung
Answer: D: Stiff lung 
Explanation: Ref: Harrison's 18/e p2206, 17/e p1680,1681