This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Electrolyte Imbalance, Subject name: Medicine
Convulsions are commonly precipitated in terminal renal failure by: 
Select and explain. 
A. Hyperkalemia, B. Hypokalemia, C. Water intoxication, D. Hypermagnesemia
C: Water intoxication
Answer: C: Water intoxication 
Explanation: In setting of terminal renal failure, the volume overload in combination with damage to blood brain barrier leads to cerebral edema which leads to seizures. The problem will be compounded by hypeensive state that leads to increase cerebral flow and resultant worsening of cerebral edema.