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: Answer is A (Bronchoscopy, lavage and brushing) : The basic idea is to obtain a tissue biopsy. FNAC could he used, however it would ceainly not be the best. Bronchoscopy would allow, both, direct visualization and biopsy, and so is the best option here.