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: Radiology
[{'content': 'The following appearance on barium enema is seen with? \nSelect and explain. \nA. Ulcer, B. Intussuception, C. Carcinoma, D. Diveiculum', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Intussusception with a classical claw sign on barium enema.', 'role': 'assistant'}]