This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: G.I.T, Subject name: Surgery
Most common electrolyte imbalance that causes paralytic ileus is 
Select and explain. 
A. Hyponatremia, B. Hypernatremia, C. Hypokalemia, D. Hyperkalemia
C: Hypokalemia
Answer: C: Hypokalemia 
Explanation: In paralytic ileus uraemia and hypokalemia are the most common contributory factors. Paralytic ileus is defined as a state in which there is failure of transmission of peristaltic waves secondary to neuromuscular failure. Reference : Bailey & Love, 27th Edition, page no = 1297.