This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General anatomy, Subject name: Anatomy
[{'content': 'SAG M stands for \nSelect and explain. \nA. Sodium chloride , Adenine , Glucose anhydrate , Mannitol, B. Sodium citrate , Adenine , Glucose anhydrate , Mannitol, C. Sodium citrate , Adenosine , Glucose anhydrate , Mannitol, D. Sodium chloride , Adenine , Gelatin , Mannitol', 'role': 'user'}, {'content': 'Answer: B \nExplanation: SAG-M solution - Packed red cells are stored to increase shelf life to 5 weeks at 2-6degC SAG-M : is Saline-Adenine-Glucose-Mannitol Ref: Bailey and love 27th edition Pgno :21', 'role': 'assistant'}]