This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Surgery
[{'content': 'What is the reason for following set of symptoms after prostatic Sx-restlessness, vomiting and change in sensorium - \nSelect and explain. \nA. Electrolyte imbalance, B. Bladder neck obstruction, C. Acute pyelonephritis, D. Ureter stenosis', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]