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': 'A patient with limited systemic sclerosis for the past 10 years complains of shortness of breath for the past one year. His pulmonary function tests are as follows: \nSelect and explain. \nA. Interstitial lung disease, B. Pulmonary artery hypertension, C. Pneumothorax, D. Diaphragmatic weakness', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]