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': 'Initial fluid of choice in treatment of hypovolemia in trauma patient \nSelect and explain. \nA. Colloid, B. Crystalloid, C. Blood, D. Plasma expanders', 'role': 'user'}, {'content': 'Answer: B \nExplanation: The initial fluid of choice is crystalloid of which normal Saline > Ringer lactate is used.', 'role': 'assistant'}]