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
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: 
Select and explain. 
A. CT scan, B. FNAC, C. Bronchography, D. Trans bronchial biopsy
D: Trans bronchial biopsy
Answer: D: Trans bronchial biopsy 
Explanation: Ans. Trans bronchial biopsy