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 patient presents with a cavitatory lesion in right upper lobe of Lung. The best investigation is 
Select and explain. 
A. Branchoscopy, lavage and brushing, B. C. T. scan, C. X ray, D. FNAC
A: Branchoscopy, lavage and brushing
Answer: A: Branchoscopy, lavage and brushing 
Explanation: None