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': "CURB-65' includes - \nSelect and explain. \nA. PaO2 less than 65 mm, B. Coagulopathy, C. Severe Azotemia, D. Base deficit (acidosis)", 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]