This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Pancreas, Subject name: Surgery
Imaging IOC for acute pancreatitis 
Select and explain. 
A. CT scan, B. USG, C. X ray, D. MRI
A: CT scan
Answer: A: CT scan 
Explanation: Ans. (a) CT ScanRef: Sabiston Page 1530/ 20th edition* The imaging investigation of choice for acute pancreatitis is CECT scan.* CECT scan is done after 72 hours of onset- ideally on the 7th day.