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': 'Blood gas measurements of a patient shows the followilng values pH 7.2, p CO2 80 mmHg,pO2 46 mmHg. Which of the following could be the most probable diagnosis - \nSelect and explain. \nA. Acute asthma, B. Acute exacerbation of COPD, C. ARDS, D. Severe pneumonia', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]