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: Surgery
[{'content': "Best diagnosis of the ectopic gastric mucosa of Meckel's diveiculum is by \nSelect and explain. \nA. Fluoroscopy, B. Occult blood test in stool, C. Ultrasound abdomen, D. Radionuclide scan", 'role': 'user'}, {'content': "Answer: D \nExplanation: Plain abdominal radiography, CT, and ultrasonography are rarely helpful.In children, the single most accurate diagnostic test for Meckel's diveicula is scintigraphy with sodium 99mTc-peechnetate. The 99mTc-peechnetate is preferentially taken up by the mucus-secreting cells of gastric mucosa and ectopic gastric tissue in the diveiculum. The diagnostic sensitivity of this scan has been repoed as high as 85%, with a specificity of 95% and an accuracy of 90% in the pediatric age group.In adults, however, the sensitivity of 99mTc-peechnetate scan falls to 63% because of the presence of less gastric mucosa in the diveiculum compared with that noted in the pediatric age group.Sabiston 20e pg:1310", 'role': 'assistant'}]