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
Blood transfusion should be completed within _____ hours of initiation - 
Select and explain. 
A. 1- 4 hours, B. 3- 6 hours, C. 4- 8 hours, D. 8- 12 hours
A: 1- 4 hours
Answer: A: 1- 4 hours 
Explanation: Ans. is 'a' i.e., 1-4 hours