This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Small & Large Intestine, Subject name: Surgery
Ectopic mucosa of Meckel's diverticulum is diagnosed by: 
Select and explain. 
A. Tc-99 radionuclide scan, B. Angiography, C. CT, D. Endoscopy
A: Tc-99 radionuclide scan
Answer: A: Tc-99 radionuclide scan 
Explanation: Ans. (a) Tc-99 radionuclide scanRef: Sabiston 19th edition, Pages 1268-1270* Tc99m radionuclide scan is based on the presence of ectopic gastric mucosa.* The sensitivity of the scan can be increased by giving glucagon, pentagastrin or cimetidine.