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: Surgery
[{'content': 'In which of the following conditions fluid levels are NOT seen? \nSelect and explain. \nA. Meconium ileus, B. Intussusception, C. Colon pouch, D. Duodenal obstruction', 'role': 'user'}, {'content': 'Answer: A \nExplanation: "In meconium ileus, meconium is so thick that it is unable to form air fluid level despite complete small intestinal obstruction". Ref: Bailey & love 25/e, Page 1199; schwaz 9/e, Page 1429.', 'role': 'assistant'}]