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: Medicine
Which is not seen in ARDS -a) Low protein edemab) Low Pulmonary artery wedge pressurec) Normal pulmonary artery wedge pressured) High pulmonary artery wedge pressure 
Select and explain. 
A. ad, B. c, C. ac, D. ab
A: ad
Answer: A: ad 
Explanation: None