This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Radiology
[{'content': "Meckel's Diveiculum is best diagnosed by: \nSelect and explain. \nA. X-ray, B. Ultrasound, C. CT scan, D. Tc99 peechnetium scan", 'role': 'user'}, {'content': 'Answer: D \nExplanation: Tc99 peechnetium scan', 'role': 'assistant'}]