This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General anatomy, Subject name: Anatomy
[{'content': 'Massive blood transfusion is defined as \nSelect and explain. \nA. 500 ml in 10 min, B. 250 ml in 5 min, C. 1 unit in 1 hour, D. 2500 ml or 5000 ml in 24 hours', 'role': 'user'}, {'content': 'Answer: D \nExplanation: According to Schwaz Massive transfusion is a single transfusion of 2500 or 5000 ml over a period of 24 hours .', 'role': 'assistant'}]