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': 'A young man with pulmonary tuberculosis presents with massive recurrent hemoptysis. For angiographic treatment, which vascular structure should be evaluated first – \nSelect and explain. \nA. Pulmonary artery, B. Bronchial artery, C. Pulmonary vein, D. Superior vena cava', 'role': 'user'}, {'content': 'Answer: B \nExplanation: "A wide variety of lung diseases may cause hemoptysis, including tuberculosis. The most common source of bleeding\xa0are bronchial arteries".', 'role': 'assistant'}]