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
[{'content': 'Acute severe lung injury is characterised by- \nSelect and explain. \nA. Hypotension, B. Shunting, C. Cardiac tamponade, D. Cardiac irregularities', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]