This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Anaesthesia Q Bank, Subject name: Anaesthesia
[{'content': 'All are true for normal saline except \nSelect and explain. \nA. normal saline 0.9% is most suitable to treat acute severe hyponatremia, B. fluid of choice for head injury patient, C. fluid of choice for hypovolemic shock, D. lead to hyperchloremic metabolic acidosis', 'role': 'user'}, {'content': 'Answer: A \nExplanation: NaCl Is preferred in conditions in which increased plasma sodium is beneficial e.g traumatic brain injury Not suitable for treatment of acute severe hyponatremia as it has little effect on plasma sodium levels When infused > 30ml/kg/hr may lead to hyperchloremic acidosis', 'role': 'assistant'}]