This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: miscellaneous, Subject name: Pathology
The shelf life of blood with CDPA - 
Select and explain. 
A. 2 weeks, B. 3 weeks d, C. 5 weeks, D. 8 weeks
C: 5 weeks
Answer: C: 5 weeks 
Explanation: citrate-phosphate-dextrose with adenine (CPDA-1) preservative was developed. The addition of adenine improved the synthesis of adenosine triphosphate (ATP) in the stored blood, which prolonged the storage of blood/red cells at 2-4 degC to 35 days. Ref: Medscape