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': "Technitium-99 scan is used for diagnosis of - \nSelect and explain. \nA. Meckel's diverticulum, B. Appendix, C. Volvulus, D. Obstruction", 'role': 'user'}, {'content': "Answer: A \nExplanation: Technetium - 99m pertechnetate scan, also known as Meckel's scan, is used primarily in the pediatric setting for diagnosis of Meckel's diverticulum.", 'role': 'assistant'}]