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 tuberculosis presents with massive recurrent hemoptysis. Most probable cause would be. \nSelect and explain. \nA. Pulmonary aery, B. Bronchial aery, C. Pulomary vein, D. Superior vena cava', 'role': 'user'}, {'content': 'Answer: B \nExplanation: B i.e. Broncheal aery In great majority of patients hemoptysis originates from systemic rather than pulmonary aeries and the bronchial vessels are almost universally involved. (Grainger) Massive hemoptysis in a patient of T.B. is usually d/ t erosion of bronchial aery which bleeds at systemic pressure.', 'role': 'assistant'}]