This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: GIT and hepatobiliary system, Subject name: Radiology
In pancreatic scanning radio-isotope used is 
Select and explain. 
A. Se75, B. Cr51, C. I131, D. Tc99
A: Se75
Answer: A: Se75 
Explanation: se75 is used for pancreatic scanning Cr51 is used to label red blood cells for measurement of mass or volume I131 is used for treating hypehyroidism and thyroid cancer I123 and Tc99 are used for thyroid scanning