This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Small & Large Intestine, Subject name: Surgery
[{'content': 'X-ray abdomen diagram with multiple fluid levels: \nSelect and explain. \nA. Intestinal obstruction, B. Hollow viscus perforation, C. Pyoperitoneum, D. None', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. (a) Intestinal obstructionRef: Bailey 26th edition, Page 1189* 3-5 air fluid levels is normal* >5 fluid levels suggest obstruction.', 'role': 'assistant'}]