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 patient of 30 yrs male presents with recurrent hemoptysis. On X-Ray no abnormality is seen. Next investigation is. \nSelect and explain. \nA. HRCT, B. Spiral CT, C. Helical CT, D. Bronchoscopy', 'role': 'user'}, {'content': 'Answer: D \nExplanation: D i.e. Bronchoscopy', 'role': 'assistant'}]