This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Blood Bank & Transfusion Therapy, Subject name: Medicine
Platelets transfusion must be completed in: 
Select and explain. 
A. 15 minutes, B. 30 minutes, C. 90 minutes, D. 120 minutes
B: 30 minutes
Answer: B: 30 minutes 
Explanation: Once the bag is opened by puncturing one of the sealed pos, the platelets must be administered within 30 minutes.