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 abdominal X-ray is seen in – \nSelect and explain. \nA. Small bowel obstruction, B. Large bowel obstruction, C. Carcinoma of stomach, D. Gastric outlet obstruction', 'role': 'user'}, {'content': 'Answer: A \nExplanation: String of beads sign is virtually diagnostic of small bowel obstruction.\nString of beads in radiology\n\n\xa0 \xa0 \xa0 \xa0 \xa0 \xa0Small bowel obstruction\n\xa0 \xa0 \xa0 \xa0 \xa0 \xa0Chronic pancreatitis\n\xa0 \xa0 \xa0 \xa0 \xa0 \xa0Fibromuscular dysplasia', 'role': 'assistant'}]