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 diagnosis of pancreatic cancer (bead) is by: 
Select and explain. 
A. Ultrasound, B. ERCP, C. CT scan, D. Angiographv
C: CT scan
Answer: C: CT scan 
Explanation: Ans. CT scan