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 to be substituted in a patient presenting with acute hemorrhagic shock- \nSelect and explain. \nA. Crystalloid, B. Colloid, C. Whole blood, D. PRBC', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Crystalloid o The priorities in patients with hemorrhagic shock are - Secure the airway Control the source of blood loss. IV volume resuscitation. o Fluid resuscitation is a major adjunct to physically controlling hemorrhage. Crystalloids are the mainstay of fluid choice.", 'role': 'assistant'}]