This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Respiratory system, Subject name: Medicine
[{'content': 'Most common abnormality associated with ARDS \nSelect and explain. \nA. Hypoxemia, B. Hypercapnea, C. Diffuse alveolar damage, D. Bilateral alveolar infiltrates', 'role': 'user'}, {'content': "Answer: A \nExplanation: The most common feature associated with ARDS is hypoxaemia,i.e.,the aerial Po2(mm Hg)/FIo2 (inspiratory O2 fraction) Reference:Harrison's Medicine- 20edition,page no:2031", 'role': 'assistant'}]