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
Best imaging modality in bronchogenic carcinoma- 
Select and explain. 
A. CT, B. MRI, C. Bronchoscopy, D. None
A: CT
Answer: A: CT 
Explanation: CT scan is the investigation of choice for pulmonary malignancy except for superior sulcus or pancoast tumor, where MRI is the investigation of choice.