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: Medicine
A 60 year old man is suspected of having bronchogenic ca : TB has been ruled out in this pt.What should be the next investigation - 
Select and explain. 
A. CT guided FNAC, B. Bronchoscopy and biopsy, C. Sputum cytology, D. X - Ray chest
A: CT guided FNAC
Answer: A: CT guided FNAC 
Explanation: None