This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: G.I.T, Subject name: Anatomy
Ectopic mucosa of Meckel's Diveicula is diagnosed by 
Select and explain. 
A. Tc-99m radionuclide scan, B. Angiography, C. CT, D. Endoscopy
A: Tc-99m radionuclide scan
Answer: A: Tc-99m radionuclide scan 
Explanation: The 99mTc- peechnetate is preferentially taken up by the mucus secreting cells of the gastric mucosa and ectopic gastric tissue in the Diveicula. It is less accurate in adults because of reduced prevalence of ectopic gastric mucosa. The sensitivity and specificity can be improved by pentagastrin and glucagon or H2-receptor antagonists(cimetidine). Ref: schwaz's principle of surgery 10th edition Pgno : 1164