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
Initial fluid of choice in treatment of hypovolemia in trauma patient 
Select and explain. 
A. Colloid, B. Crystalloid, C. Blood, D. Plasma expanders
B: Crystalloid
Answer: B: Crystalloid 
Explanation: The initial fluid of choice is crystalloid of which normal Saline > Ringer lactate is used.