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': 'Golden hour is \nSelect and explain. \nA. Within first half hour after trauma, B. Within one hour after trauma, C. Within one and half hours after trauma, D. Within two hours after trauma', 'role': 'user'}, {'content': 'Answer: B \nExplanation: The concept of the ‘golden hour’ describes the urgent need for treatment of trauma victims within the first hour after injury.', 'role': 'assistant'}]