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: Surgery
A 57 year old male suffering from acute pancreatitis develops sudden onset breathlessness with a CVP< 18mmHg. The chest xray shows bilateral infiltrates. The possible diagnosis is 
Select and explain. 
A. ARDS, B. Myocardial infarction, C. Congestive left hea failure, D. Pulmonary embolism
A: ARDS
Answer: A: ARDS 
Explanation: Answer- A. ARDSARDS CriteriaAcute, meaning onset over 1 week or less.Bilateral opacities consistent with pulmonary edema must be present and may be detected on CT or chest radiograph.PF ratio < 300 mmHg with a minimum of 5 cmH20 PEEP (or CPAP).CVP < l8 mmHg.