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
First to be substituted in a patient presenting with acute hemorrhagic shock- 
Select and explain. 
A. Crystalloid, B. Colloid, C. Whole blood, D. PRBC
A: Crystalloid
Answer: A: Crystalloid 
Explanation: 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.