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': 'A55-year-old male has a 5 cm cavitating lesion of unknown duration at the apex of the right lung. The investigation to be carried out: \nSelect and explain. \nA. CT scan, B. FNAC, C. Bronchography, D. Trans bronchial biopsy', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ans. Trans bronchial biopsy', 'role': 'assistant'}]