This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Surgery
[{'content': 'IOC for acute appendicitis in children \nSelect and explain. \nA. USG, B. MRI, C. CECT, D. X ray', 'role': 'user'}, {'content': 'Answer: A \nExplanation: .', 'role': 'assistant'}]