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: Medicine
Platelets transfusion must be completed in how many hours after entering the bag 
Select and explain. 
A. 1 hour, B. 2 hour, C. 3 hour, D. 4 hour
D: 4 hour
Answer: D: 4 hour 
Explanation: Answer- D. 4 hour Once the blood bag is opened hy puncturing one of the sealed pos, the platelets must be administered within 4 hours