This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Intestinal obstruction, Subject name: Surgery
[{'content': 'Most common electrolyte imbalance that causes paralytic ileus is: \nSelect and explain. \nA. Hyponatremia, B. Hypernatremia, C. Hypokalemia, D. Hyperkalemia', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Paralytic Ileus: Common Etiologies Abdominal surgery Uremia Medications: - Anticholinergics - Opiates - Phenothiazines - Calcium channel blockers - Tricyclic antidepressants Infections: - Sepsis - Intra-abdominal abscess - Peritonitis - Pneumonia Hypothyroidism Ureteral colic Retroperitoneal hemmorrhage Spinal cord Injury Myocardical infarction Mesenteric ischemia Electrolyte abnormalities: - Hypokalemia - Hypomagnesmia - Hypermagnesemia - Hyponatremia', 'role': 'assistant'}]