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: Radiology
[{'content': 'Prunning of pulmonary arteries is seen in – \nSelect and explain. \nA. Pulmonary hypertension, B. Chronic bronchitis, C. Pulmonary infections, D. Pulmonary transplant', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Characteristic radiological feature of pulmonary hypertension is enlargement of central arteries with peripheral prunning', 'role': 'assistant'}]