This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Cardio thoracic surgery  , Subject name: Surgery
[{'content': 'Adult respiratory distress syndrome is defined by all except: \nSelect and explain. \nA. PCWP > 18 mmHg, B. PaO2/FiO2 < 200, C. Diffuse bilateral air space edema on Chest X-Ray, D. All of the above', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Diagnostic Criteria Acute Lung Injury (ALI) ARDS PaO2/FiO2 </= 300 mmHg </= 200 mmHg Onset Acute Acute Chest X-Ray Bilateral alveolar or interstitial infiltrates Bilateral alveolar or interstitial infiltrates Absence of Left Atrial Hypeension PCWP </= 18 mmHg No Clinical evidence of increased left atrial pressure PCWP </= 18 mmHg No clinical evidence of increased left atrial pressure Ref: Harrison&;s 19th edition Pgno: 1736', 'role': 'assistant'}]