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': 'Air pressure of atmosphere at sea level (pound/square inch): March 2013 (g) \nSelect and explain. \nA. 3-Feb, B. 7-May, C. 11-Sep, D. 13-15', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ans. D i.e. 13-15', 'role': 'assistant'}]