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: Radiology
[{'content': "Claw sign on x-ray is seen in? \nSelect and explain. \nA. Ischemic colitis, B. Intussusception, C. Sigmoid volvulus, D. Crohn's disease", 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans BClaw signQ is seen in Intussuception. It is the appearance of dilated loop of bowel which appears like a claw of a bird. It is described in both plain abdominal films as well as on barium studies', 'role': 'assistant'}]