This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Urethra & Penis, Subject name: Surgery
[{'content': 'Which electrolyte abnormality occurs after TRUP: \nSelect and explain. \nA. Hypokalemia, B. Hyponatremia, C. Hyperkalemia, D. Hypernatremia', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. (b) HyponatremiaRef: Bailey 26th Edition, page 1349* Most common electrolyte abnormality during TURP is HYPONATREMIA due to water intoxication.', 'role': 'assistant'}]