This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Fluid & Electrolyte, Subject name: Surgery
Which of the following electrolyte abnormalities can be seen after brain injury? 
Select and explain. 
A. Hyponatremia, B. Hyperkalemia, C. Hypomagnesemia, D. All the above
D: All the above
Answer: D: All the above 
Explanation: Ans. is 'd' i.e., All the above Electrolyte abnormalities seen in brain injury* Electrolyte abnormalities occur in 60% of the patients with head injury.* Hyponatremia is the most common electrolyte abnormality seen and is often secondary to SIADH.* Other Electrolyte disorders including hypernatremia, hypokalemia, hyperkalemia, hypophosphatemia and hypomagnesemia are also common after acquired brain injury.