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: Medicine
[{'content': 'Non-propulsive peristalsis is a feature of \nSelect and explain. \nA. Paralytic ileus, B. Impacted faeces, C. Mesenteric vascular occlusion, D. Incarceration', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]