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': '"String of beads" appearance on horizontal abdominal view X-ray is suggestive of: \nSelect and explain. \nA. Intussusception, B. Sigmoid volvulus, C. Small bowel obstruction, D. Large bowel obstruction', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ans. Small bowel obstruction', 'role': 'assistant'}]