This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Transfusion, Subject name: Medicine
[{'content': 'Blood transfusion should be completed within _____ hours of initiation - \nSelect and explain. \nA. 1- 4 hours, B. 3- 6 hours, C. 4- 8 hours, D. 8- 12 hours', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., 1-4 hours", 'role': 'assistant'}]