This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Shock, Subject name: Surgery
[{'content': 'First line of therapy in shock in the patient of trauma:- \nSelect and explain. \nA. Crystalloids, B. Colloids, C. Inotropes, D. Blood transfusion', 'role': 'user'}, {'content': 'Answer: A \nExplanation: First line of therapy in shock in the patient of trauma is crystalloids. Resuscitation following blood loss in trauma patients begins with administration of 1 liter of isotonic crystalloid immediately to restore BP and peripheral circulationQ. Lactated ringer (RL) solution is generally preferred over 0.9% NaCl (normal saline) as it is balanced salt solution and designed to mimic extracellular fluidQ. Resuscitation with colloids is no more effective than crystalloids but is more expensiveQ.', 'role': 'assistant'}]