This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Respiratory, Subject name: Medicine
[{'content': 'Rampal, 45 yr old man presents with history of recurrent hemoptysis and purulent sputum. His chest X-Ray is normal, which of the following will be the next best investigation for him? \nSelect and explain. \nA. HRCT, B. CT guided angiography, C. Angiography, D. Spiral CT', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. is \'a\' i.e. HRCT History of the pt. points towards the diagnosis of bronchiectasis. To rule out or confirm the diagnosis of bronchiectasis, HRCT is advised.Harrison writes - "In patients with suspected bronchiectasis, HRCT is now the diagnostic procedure of choice, having replaced bronchography."', 'role': 'assistant'}]